./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl/chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl/chromosome-symm.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 a7fe70f1977b3852d2d68e09c907bf07ada9c631 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 11:55:24,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 11:55:24,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 11:55:24,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 11:55:24,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 11:55:24,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 11:55:24,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 11:55:24,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 11:55:24,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 11:55:24,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 11:55:24,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 11:55:24,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 11:55:24,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 11:55:24,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 11:55:24,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 11:55:24,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 11:55:24,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 11:55:24,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 11:55:24,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 11:55:24,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 11:55:24,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 11:55:24,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 11:55:24,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 11:55:24,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 11:55:24,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 11:55:24,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 11:55:24,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 11:55:24,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 11:55:24,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 11:55:24,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 11:55:24,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 11:55:24,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 11:55:24,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 11:55:24,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 11:55:24,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 11:55:24,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 11:55:24,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 11:55:24,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 11:55:24,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 11:55:24,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 11:55:24,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 11:55:24,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 11:55:24,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 11:55:24,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 11:55:24,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 11:55:24,898 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 11:55:24,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 11:55:24,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 11:55:24,900 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 11:55:24,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 11:55:24,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 11:55:24,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 11:55:24,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 11:55:24,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 11:55:24,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 11:55:24,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 11:55:24,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 11:55:24,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 11:55:24,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 11:55:24,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 11:55:24,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 11:55:24,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 11:55:24,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 11:55:24,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 11:55:24,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 11:55:24,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 11:55:24,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 11:55:24,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 11:55:24,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 11:55:24,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 11:55:24,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 11:55:24,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 11:55:24,907 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7fe70f1977b3852d2d68e09c907bf07ada9c631 [2021-10-03 11:55:25,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 11:55:25,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 11:55:25,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 11:55:25,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 11:55:25,333 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 11:55:25,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl/chromosome-symm.wvr.c [2021-10-03 11:55:25,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9aa7743c/70481405ffde48aba5e0a09acf293d0d/FLAGa7fb7c864 [2021-10-03 11:55:26,019 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 11:55:26,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl/chromosome-symm.wvr.c [2021-10-03 11:55:26,020 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 11:55:26,020 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 11:55:26,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9aa7743c/70481405ffde48aba5e0a09acf293d0d/FLAGa7fb7c864 [2021-10-03 11:55:26,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f9aa7743c/70481405ffde48aba5e0a09acf293d0d [2021-10-03 11:55:26,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 11:55:26,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 11:55:26,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 11:55:26,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 11:55:26,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 11:55:26,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236ac1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26, skipping insertion in model container [2021-10-03 11:55:26,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 11:55:26,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 11:55:26,585 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 11:55:26,645 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl/chromosome-symm.wvr.c[1302,1315] [2021-10-03 11:55:26,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 11:55:26,685 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 11:55:26,698 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 11:55:26,735 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl/chromosome-symm.wvr.c[1302,1315] [2021-10-03 11:55:26,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 11:55:26,763 INFO L208 MainTranslator]: Completed translation [2021-10-03 11:55:26,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26 WrapperNode [2021-10-03 11:55:26,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 11:55:26,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 11:55:26,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 11:55:26,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 11:55:26,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 11:55:26,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 11:55:26,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 11:55:26,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 11:55:26,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 11:55:26,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 11:55:26,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 11:55:26,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 11:55:26,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (1/1) ... [2021-10-03 11:55:26,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 11:55:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:26,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-03 11:55:27,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-03 11:55:27,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 11:55:27,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 11:55:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 11:55:27,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 11:55:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 11:55:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 11:55:27,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-03 11:55:27,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 11:55:27,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 11:55:27,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 11:55:27,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 11:55:27,074 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 11:55:27,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 11:55:27,560 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-10-03 11:55:27,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:55:27 BoogieIcfgContainer [2021-10-03 11:55:27,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 11:55:27,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 11:55:27,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 11:55:27,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 11:55:27,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 11:55:26" (1/3) ... [2021-10-03 11:55:27,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43266293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 11:55:27, skipping insertion in model container [2021-10-03 11:55:27,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 11:55:26" (2/3) ... [2021-10-03 11:55:27,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43266293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 11:55:27, skipping insertion in model container [2021-10-03 11:55:27,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:55:27" (3/3) ... [2021-10-03 11:55:27,572 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.c [2021-10-03 11:55:27,585 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 11:55:27,586 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 11:55:27,586 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 11:55:27,586 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 11:55:27,621 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,622 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,623 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,623 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,623 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,624 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,624 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,624 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,624 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,625 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,625 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,625 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,626 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,626 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,626 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,627 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,628 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,628 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,628 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,629 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,629 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,629 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,630 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,631 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,632 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,632 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,632 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,632 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,633 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,633 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,633 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,633 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,634 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,634 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,634 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,635 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,635 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,635 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,636 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,636 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,636 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,637 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,637 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,637 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,637 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,638 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,638 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,638 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,638 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,639 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,639 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,639 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,640 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,640 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,640 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,641 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,641 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,641 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,641 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,642 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,642 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,643 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,643 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,643 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,644 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,645 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,645 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,645 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,645 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,646 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,646 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,646 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,646 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,647 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,647 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,650 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,651 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,651 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,652 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,652 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,657 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,657 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,658 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,658 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,658 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,658 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,659 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,659 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 11:55:27,666 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-03 11:55:27,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 11:55:27,725 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 [2021-10-03 11:55:27,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-03 11:55:27,744 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 11:55:27,757 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 157 transitions, 330 flow [2021-10-03 11:55:27,761 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 157 transitions, 330 flow [2021-10-03 11:55:27,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 147 places, 157 transitions, 330 flow [2021-10-03 11:55:27,846 INFO L129 PetriNetUnfolder]: 17/155 cut-off events. [2021-10-03 11:55:27,847 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-03 11:55:27,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 17/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 102. Up to 3 conditions per place. [2021-10-03 11:55:27,862 INFO L116 LiptonReduction]: Number of co-enabled transitions 1512 [2021-10-03 11:55:32,209 INFO L131 LiptonReduction]: Checked pairs total: 2112 [2021-10-03 11:55:32,210 INFO L133 LiptonReduction]: Total number of compositions: 159 [2021-10-03 11:55:32,220 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 28 transitions, 72 flow [2021-10-03 11:55:32,236 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 74 states, 73 states have (on average 2.6301369863013697) internal successors, (192), 73 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 73 states have (on average 2.6301369863013697) internal successors, (192), 73 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 11:55:32,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:32,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:32,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:32,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1713388925, now seen corresponding path program 1 times [2021-10-03 11:55:32,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:32,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420927385] [2021-10-03 11:55:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:32,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 11:55:32,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:32,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420927385] [2021-10-03 11:55:32,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420927385] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:32,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:55:32,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 11:55:32,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614793986] [2021-10-03 11:55:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 11:55:32,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:32,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 11:55:32,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 11:55:32,533 INFO L87 Difference]: Start difference. First operand has 74 states, 73 states have (on average 2.6301369863013697) internal successors, (192), 73 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-03 11:55:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:32,571 INFO L93 Difference]: Finished difference Result 76 states and 194 transitions. [2021-10-03 11:55:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 11:55:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 15 [2021-10-03 11:55:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:32,586 INFO L225 Difference]: With dead ends: 76 [2021-10-03 11:55:32,587 INFO L226 Difference]: Without dead ends: 76 [2021-10-03 11:55:32,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 11:55:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-03 11:55:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-03 11:55:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.5866666666666664) internal successors, (194), 75 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 194 transitions. [2021-10-03 11:55:32,637 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 194 transitions. Word has length 15 [2021-10-03 11:55:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:32,638 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 194 transitions. [2021-10-03 11:55:32,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-03 11:55:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 194 transitions. [2021-10-03 11:55:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 11:55:32,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:32,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:32,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 11:55:32,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1921547018, now seen corresponding path program 1 times [2021-10-03 11:55:32,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:32,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83857723] [2021-10-03 11:55:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:32,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 11:55:32,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:32,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83857723] [2021-10-03 11:55:32,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83857723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:32,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565118710] [2021-10-03 11:55:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:32,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:32,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:32,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:32,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-03 11:55:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-03 11:55:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 11:55:32,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565118710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:32,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:32,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-10-03 11:55:32,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938836961] [2021-10-03 11:55:32,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 11:55:32,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:32,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 11:55:32,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 11:55:32,984 INFO L87 Difference]: Start difference. First operand 76 states and 194 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:33,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:33,007 INFO L93 Difference]: Finished difference Result 78 states and 196 transitions. [2021-10-03 11:55:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:33,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-03 11:55:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:33,010 INFO L225 Difference]: With dead ends: 78 [2021-10-03 11:55:33,010 INFO L226 Difference]: Without dead ends: 78 [2021-10-03 11:55:33,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-03 11:55:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-03 11:55:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-03 11:55:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.5454545454545454) internal successors, (196), 77 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 196 transitions. [2021-10-03 11:55:33,029 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 196 transitions. Word has length 17 [2021-10-03 11:55:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:33,032 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 196 transitions. [2021-10-03 11:55:33,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 196 transitions. [2021-10-03 11:55:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 11:55:33,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:33,037 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:33,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:33,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:33,251 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2040153955, now seen corresponding path program 2 times [2021-10-03 11:55:33,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:33,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495858571] [2021-10-03 11:55:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:33,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 11:55:33,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:33,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495858571] [2021-10-03 11:55:33,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495858571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:33,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840088027] [2021-10-03 11:55:33,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:33,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:33,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:33,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-03 11:55:33,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-03 11:55:33,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:33,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:33,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 11:55:33,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840088027] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:33,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:55:33,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-03 11:55:33,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40861438] [2021-10-03 11:55:33,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:33,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:33,533 INFO L87 Difference]: Start difference. First operand 78 states and 196 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2021-10-03 11:55:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:33,567 INFO L93 Difference]: Finished difference Result 120 states and 301 transitions. [2021-10-03 11:55:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:33,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 19 [2021-10-03 11:55:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:33,571 INFO L225 Difference]: With dead ends: 120 [2021-10-03 11:55:33,571 INFO L226 Difference]: Without dead ends: 120 [2021-10-03 11:55:33,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-03 11:55:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-10-03 11:55:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.550561797752809) internal successors, (227), 89 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:33,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2021-10-03 11:55:33,587 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 19 [2021-10-03 11:55:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:33,587 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2021-10-03 11:55:33,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2021-10-03 11:55:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2021-10-03 11:55:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 11:55:33,590 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:33,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:33,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:33,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:33,801 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2004526945, now seen corresponding path program 3 times [2021-10-03 11:55:33,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:33,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153405096] [2021-10-03 11:55:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:33,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 11:55:33,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:33,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153405096] [2021-10-03 11:55:33,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153405096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:33,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020343073] [2021-10-03 11:55:33,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:55:33,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:33,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:33,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:33,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-03 11:55:33,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-03 11:55:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:33,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 11:55:34,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020343073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:34,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:55:34,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-03 11:55:34,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545688565] [2021-10-03 11:55:34,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:34,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:34,085 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2021-10-03 11:55:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:34,134 INFO L93 Difference]: Finished difference Result 138 states and 350 transitions. [2021-10-03 11:55:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 19 [2021-10-03 11:55:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:34,141 INFO L225 Difference]: With dead ends: 138 [2021-10-03 11:55:34,141 INFO L226 Difference]: Without dead ends: 138 [2021-10-03 11:55:34,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-03 11:55:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2021-10-03 11:55:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.568421052631579) internal successors, (244), 95 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 244 transitions. [2021-10-03 11:55:34,179 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 244 transitions. Word has length 19 [2021-10-03 11:55:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:34,181 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 244 transitions. [2021-10-03 11:55:34,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2021-10-03 11:55:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 244 transitions. [2021-10-03 11:55:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-03 11:55:34,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:34,186 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:34,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:34,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:34,401 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1249146263, now seen corresponding path program 1 times [2021-10-03 11:55:34,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:34,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032470752] [2021-10-03 11:55:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:34,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 11:55:34,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:34,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032470752] [2021-10-03 11:55:34,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032470752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:34,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868691550] [2021-10-03 11:55:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:34,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:34,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:34,482 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:34,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-03 11:55:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 11:55:34,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-03 11:55:34,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868691550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:34,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:34,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-10-03 11:55:34,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251998771] [2021-10-03 11:55:34,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 11:55:34,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 11:55:34,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:34,646 INFO L87 Difference]: Start difference. First operand 96 states and 244 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:34,671 INFO L93 Difference]: Finished difference Result 98 states and 246 transitions. [2021-10-03 11:55:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:55:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-03 11:55:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:34,673 INFO L225 Difference]: With dead ends: 98 [2021-10-03 11:55:34,673 INFO L226 Difference]: Without dead ends: 98 [2021-10-03 11:55:34,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-03 11:55:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-03 11:55:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.536082474226804) internal successors, (246), 97 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 246 transitions. [2021-10-03 11:55:34,683 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 246 transitions. Word has length 20 [2021-10-03 11:55:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:34,684 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 246 transitions. [2021-10-03 11:55:34,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 246 transitions. [2021-10-03 11:55:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-03 11:55:34,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:34,686 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:34,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:34,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:34,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash -364153412, now seen corresponding path program 2 times [2021-10-03 11:55:34,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:34,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589626807] [2021-10-03 11:55:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:34,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 11:55:35,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:35,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589626807] [2021-10-03 11:55:35,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589626807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:35,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48517715] [2021-10-03 11:55:35,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:35,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:35,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:35,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:35,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-03 11:55:35,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-03 11:55:35,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:35,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-03 11:55:35,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48517715] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:35,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:55:35,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-10-03 11:55:35,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975502342] [2021-10-03 11:55:35,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:35,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:35,233 INFO L87 Difference]: Start difference. First operand 98 states and 246 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-03 11:55:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:35,277 INFO L93 Difference]: Finished difference Result 194 states and 476 transitions. [2021-10-03 11:55:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 22 [2021-10-03 11:55:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:35,280 INFO L225 Difference]: With dead ends: 194 [2021-10-03 11:55:35,280 INFO L226 Difference]: Without dead ends: 188 [2021-10-03 11:55:35,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-03 11:55:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 102. [2021-10-03 11:55:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.5247524752475248) internal successors, (255), 101 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 255 transitions. [2021-10-03 11:55:35,291 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 255 transitions. Word has length 22 [2021-10-03 11:55:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:35,291 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 255 transitions. [2021-10-03 11:55:35,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-03 11:55:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 255 transitions. [2021-10-03 11:55:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-03 11:55:35,293 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:35,293 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:35,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:35,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash 357077674, now seen corresponding path program 3 times [2021-10-03 11:55:35,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:35,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549269215] [2021-10-03 11:55:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:35,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 11:55:35,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:35,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549269215] [2021-10-03 11:55:35,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549269215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:35,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184718736] [2021-10-03 11:55:35,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:55:35,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:35,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:35,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:35,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-03 11:55:35,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-03 11:55:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-03 11:55:35,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184718736] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:35,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:55:35,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-10-03 11:55:35,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722949369] [2021-10-03 11:55:35,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:35,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:35,807 INFO L87 Difference]: Start difference. First operand 102 states and 255 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-03 11:55:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:35,845 INFO L93 Difference]: Finished difference Result 170 states and 425 transitions. [2021-10-03 11:55:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:35,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 22 [2021-10-03 11:55:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:35,848 INFO L225 Difference]: With dead ends: 170 [2021-10-03 11:55:35,848 INFO L226 Difference]: Without dead ends: 170 [2021-10-03 11:55:35,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-03 11:55:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 104. [2021-10-03 11:55:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.5242718446601944) internal successors, (260), 103 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 260 transitions. [2021-10-03 11:55:35,856 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 260 transitions. Word has length 22 [2021-10-03 11:55:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:35,857 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 260 transitions. [2021-10-03 11:55:35,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-03 11:55:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 260 transitions. [2021-10-03 11:55:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-03 11:55:35,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:35,859 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:35,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:36,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:36,074 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -428314907, now seen corresponding path program 1 times [2021-10-03 11:55:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:36,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204871717] [2021-10-03 11:55:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:36,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 11:55:36,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:36,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204871717] [2021-10-03 11:55:36,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204871717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:36,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142109759] [2021-10-03 11:55:36,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:36,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:36,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:36,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-03 11:55:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 11:55:36,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142109759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:36,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:36,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-10-03 11:55:36,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069161688] [2021-10-03 11:55:36,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-03 11:55:36,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-03 11:55:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:55:36,399 INFO L87 Difference]: Start difference. First operand 104 states and 260 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:36,432 INFO L93 Difference]: Finished difference Result 106 states and 262 transitions. [2021-10-03 11:55:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 11:55:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-03 11:55:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:36,434 INFO L225 Difference]: With dead ends: 106 [2021-10-03 11:55:36,434 INFO L226 Difference]: Without dead ends: 106 [2021-10-03 11:55:36,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:55:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-03 11:55:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-03 11:55:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4952380952380953) internal successors, (262), 105 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 262 transitions. [2021-10-03 11:55:36,442 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 262 transitions. Word has length 24 [2021-10-03 11:55:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:36,443 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 262 transitions. [2021-10-03 11:55:36,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 262 transitions. [2021-10-03 11:55:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 11:55:36,451 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:36,451 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:36,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:36,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:36,666 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash -347675342, now seen corresponding path program 2 times [2021-10-03 11:55:36,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:36,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213932414] [2021-10-03 11:55:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:36,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 11:55:36,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:36,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213932414] [2021-10-03 11:55:36,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213932414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:36,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173995104] [2021-10-03 11:55:36,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:36,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:36,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:36,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:36,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-03 11:55:36,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-03 11:55:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:36,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-03 11:55:36,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173995104] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:36,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:55:36,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-10-03 11:55:36,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200964681] [2021-10-03 11:55:36,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:36,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:36,987 INFO L87 Difference]: Start difference. First operand 106 states and 262 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-10-03 11:55:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:37,003 INFO L93 Difference]: Finished difference Result 158 states and 392 transitions. [2021-10-03 11:55:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:37,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 26 [2021-10-03 11:55:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:37,006 INFO L225 Difference]: With dead ends: 158 [2021-10-03 11:55:37,006 INFO L226 Difference]: Without dead ends: 158 [2021-10-03 11:55:37,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-03 11:55:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-10-03 11:55:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.514018691588785) internal successors, (269), 107 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 269 transitions. [2021-10-03 11:55:37,012 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 269 transitions. Word has length 26 [2021-10-03 11:55:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:37,013 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 269 transitions. [2021-10-03 11:55:37,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-10-03 11:55:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 269 transitions. [2021-10-03 11:55:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-03 11:55:37,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:37,015 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:37,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:37,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:37,227 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1532863540, now seen corresponding path program 3 times [2021-10-03 11:55:37,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:37,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439581189] [2021-10-03 11:55:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:37,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 11:55:37,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:37,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439581189] [2021-10-03 11:55:37,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439581189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:37,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974310253] [2021-10-03 11:55:37,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:55:37,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:37,342 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:37,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-03 11:55:37,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-03 11:55:37,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:37,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:37,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-03 11:55:37,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974310253] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:37,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-03 11:55:37,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-10-03 11:55:37,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382128708] [2021-10-03 11:55:37,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:37,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:37,516 INFO L87 Difference]: Start difference. First operand 108 states and 269 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-10-03 11:55:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:37,543 INFO L93 Difference]: Finished difference Result 144 states and 354 transitions. [2021-10-03 11:55:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:37,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 26 [2021-10-03 11:55:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:37,545 INFO L225 Difference]: With dead ends: 144 [2021-10-03 11:55:37,546 INFO L226 Difference]: Without dead ends: 142 [2021-10-03 11:55:37,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:55:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-03 11:55:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2021-10-03 11:55:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.4953271028037385) internal successors, (267), 107 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 267 transitions. [2021-10-03 11:55:37,552 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 267 transitions. Word has length 26 [2021-10-03 11:55:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:37,553 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 267 transitions. [2021-10-03 11:55:37,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-10-03 11:55:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 267 transitions. [2021-10-03 11:55:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-03 11:55:37,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:37,554 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:37,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:37,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:37,770 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:37,771 INFO L82 PathProgramCache]: Analyzing trace with hash -405956708, now seen corresponding path program 1 times [2021-10-03 11:55:37,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:37,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686108382] [2021-10-03 11:55:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:37,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 11:55:37,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:37,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686108382] [2021-10-03 11:55:37,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686108382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:37,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731486326] [2021-10-03 11:55:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:37,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:37,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:37,872 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:37,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-03 11:55:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 11:55:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-03 11:55:38,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731486326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:38,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:38,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-03 11:55:38,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897344640] [2021-10-03 11:55:38,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:55:38,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:55:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:55:38,117 INFO L87 Difference]: Start difference. First operand 108 states and 267 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:38,152 INFO L93 Difference]: Finished difference Result 110 states and 269 transitions. [2021-10-03 11:55:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:55:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-03 11:55:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:38,154 INFO L225 Difference]: With dead ends: 110 [2021-10-03 11:55:38,154 INFO L226 Difference]: Without dead ends: 110 [2021-10-03 11:55:38,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:55:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-03 11:55:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-03 11:55:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.467889908256881) internal successors, (269), 109 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 269 transitions. [2021-10-03 11:55:38,159 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 269 transitions. Word has length 27 [2021-10-03 11:55:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:38,159 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 269 transitions. [2021-10-03 11:55:38,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 269 transitions. [2021-10-03 11:55:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-03 11:55:38,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:38,161 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:38,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:38,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-03 11:55:38,375 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1619499049, now seen corresponding path program 2 times [2021-10-03 11:55:38,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:38,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471349679] [2021-10-03 11:55:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:38,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:38,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:38,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471349679] [2021-10-03 11:55:38,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471349679] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:38,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:55:38,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 11:55:38,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857944853] [2021-10-03 11:55:38,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 11:55:38,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 11:55:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 11:55:38,460 INFO L87 Difference]: Start difference. First operand 110 states and 269 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:38,475 INFO L93 Difference]: Finished difference Result 157 states and 355 transitions. [2021-10-03 11:55:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 11:55:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-03 11:55:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:38,478 INFO L225 Difference]: With dead ends: 157 [2021-10-03 11:55:38,478 INFO L226 Difference]: Without dead ends: 146 [2021-10-03 11:55:38,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 11:55:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-03 11:55:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 110. [2021-10-03 11:55:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.376146788990826) internal successors, (259), 109 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 259 transitions. [2021-10-03 11:55:38,484 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 259 transitions. Word has length 29 [2021-10-03 11:55:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:38,485 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 259 transitions. [2021-10-03 11:55:38,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,485 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 259 transitions. [2021-10-03 11:55:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 11:55:38,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:38,486 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-03 11:55:38,487 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash 132391427, now seen corresponding path program 1 times [2021-10-03 11:55:38,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:38,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702413080] [2021-10-03 11:55:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:38,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:38,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:38,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702413080] [2021-10-03 11:55:38,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702413080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:38,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748744838] [2021-10-03 11:55:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:38,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:38,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:38,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:38,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-03 11:55:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 11:55:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:38,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748744838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:38,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:38,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-03 11:55:38,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619372669] [2021-10-03 11:55:38,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:55:38,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:55:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:38,827 INFO L87 Difference]: Start difference. First operand 110 states and 259 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:38,864 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2021-10-03 11:55:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:55:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 11:55:38,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:38,867 INFO L225 Difference]: With dead ends: 254 [2021-10-03 11:55:38,867 INFO L226 Difference]: Without dead ends: 254 [2021-10-03 11:55:38,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-03 11:55:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 158. [2021-10-03 11:55:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.477707006369427) internal successors, (389), 157 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 389 transitions. [2021-10-03 11:55:38,875 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 389 transitions. Word has length 30 [2021-10-03 11:55:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:38,875 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 389 transitions. [2021-10-03 11:55:38,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 389 transitions. [2021-10-03 11:55:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-03 11:55:38,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:38,876 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:38,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-03 11:55:39,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:39,091 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 690274856, now seen corresponding path program 1 times [2021-10-03 11:55:39,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:39,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486384454] [2021-10-03 11:55:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:39,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:39,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:39,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486384454] [2021-10-03 11:55:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486384454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:39,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350220137] [2021-10-03 11:55:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:39,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:39,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:39,151 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:39,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-03 11:55:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-03 11:55:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:39,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350220137] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:39,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:39,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-03 11:55:39,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050366317] [2021-10-03 11:55:39,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-03 11:55:39,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-03 11:55:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:39,394 INFO L87 Difference]: Start difference. First operand 158 states and 389 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:39,426 INFO L93 Difference]: Finished difference Result 312 states and 748 transitions. [2021-10-03 11:55:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 11:55:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-03 11:55:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:39,433 INFO L225 Difference]: With dead ends: 312 [2021-10-03 11:55:39,433 INFO L226 Difference]: Without dead ends: 312 [2021-10-03 11:55:39,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-03 11:55:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-03 11:55:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 206. [2021-10-03 11:55:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.5707317073170732) internal successors, (527), 205 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 527 transitions. [2021-10-03 11:55:39,443 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 527 transitions. Word has length 30 [2021-10-03 11:55:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:39,443 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 527 transitions. [2021-10-03 11:55:39,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 527 transitions. [2021-10-03 11:55:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-03 11:55:39,445 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:39,445 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:39,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:39,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-03 11:55:39,659 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash -997533165, now seen corresponding path program 2 times [2021-10-03 11:55:39,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:39,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385133968] [2021-10-03 11:55:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:39,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:39,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385133968] [2021-10-03 11:55:39,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385133968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:39,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974849863] [2021-10-03 11:55:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:39,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:39,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:39,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-03 11:55:39,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:55:39,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:39,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-03 11:55:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:40,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974849863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:40,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:40,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-03 11:55:40,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802215721] [2021-10-03 11:55:40,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 11:55:40,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 11:55:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:40,050 INFO L87 Difference]: Start difference. First operand 206 states and 527 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:40,096 INFO L93 Difference]: Finished difference Result 364 states and 865 transitions. [2021-10-03 11:55:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:55:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-03 11:55:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:40,100 INFO L225 Difference]: With dead ends: 364 [2021-10-03 11:55:40,100 INFO L226 Difference]: Without dead ends: 364 [2021-10-03 11:55:40,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-03 11:55:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2021-10-03 11:55:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6284584980237153) internal successors, (665), 253 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 665 transitions. [2021-10-03 11:55:40,112 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 665 transitions. Word has length 32 [2021-10-03 11:55:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:40,112 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 665 transitions. [2021-10-03 11:55:40,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 665 transitions. [2021-10-03 11:55:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 11:55:40,114 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:40,114 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:40,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:40,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-03 11:55:40,328 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:40,329 INFO L82 PathProgramCache]: Analyzing trace with hash 516596542, now seen corresponding path program 3 times [2021-10-03 11:55:40,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:40,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129995889] [2021-10-03 11:55:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:40,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:40,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:40,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129995889] [2021-10-03 11:55:40,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129995889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:40,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841821824] [2021-10-03 11:55:40,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:55:40,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:40,444 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:40,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-03 11:55:40,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 11:55:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-03 11:55:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:40,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841821824] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:40,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:40,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-03 11:55:40,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54461096] [2021-10-03 11:55:40,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:55:40,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:55:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:40,854 INFO L87 Difference]: Start difference. First operand 254 states and 665 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:40,905 INFO L93 Difference]: Finished difference Result 438 states and 1040 transitions. [2021-10-03 11:55:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 11:55:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 11:55:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:40,910 INFO L225 Difference]: With dead ends: 438 [2021-10-03 11:55:40,910 INFO L226 Difference]: Without dead ends: 438 [2021-10-03 11:55:40,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-03 11:55:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 302. [2021-10-03 11:55:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.6677740863787376) internal successors, (803), 301 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 803 transitions. [2021-10-03 11:55:40,922 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 803 transitions. Word has length 34 [2021-10-03 11:55:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:40,923 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 803 transitions. [2021-10-03 11:55:40,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:40,923 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 803 transitions. [2021-10-03 11:55:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-03 11:55:40,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:40,925 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:40,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:41,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-03 11:55:41,139 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:41,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1272471620, now seen corresponding path program 2 times [2021-10-03 11:55:41,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:41,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509723072] [2021-10-03 11:55:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:41,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:41,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:41,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509723072] [2021-10-03 11:55:41,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509723072] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:41,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51737455] [2021-10-03 11:55:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:41,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:41,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:41,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-03 11:55:41,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:55:41,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-03 11:55:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:41,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51737455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:41,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:41,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-03 11:55:41,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633203745] [2021-10-03 11:55:41,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-03 11:55:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:41,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-03 11:55:41,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:41,577 INFO L87 Difference]: Start difference. First operand 302 states and 803 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:41,640 INFO L93 Difference]: Finished difference Result 638 states and 1591 transitions. [2021-10-03 11:55:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 11:55:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-03 11:55:41,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:41,646 INFO L225 Difference]: With dead ends: 638 [2021-10-03 11:55:41,647 INFO L226 Difference]: Without dead ends: 638 [2021-10-03 11:55:41,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-03 11:55:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-10-03 11:55:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 398. [2021-10-03 11:55:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.712846347607053) internal successors, (1077), 397 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1077 transitions. [2021-10-03 11:55:41,665 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1077 transitions. Word has length 34 [2021-10-03 11:55:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:41,666 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1077 transitions. [2021-10-03 11:55:41,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1077 transitions. [2021-10-03 11:55:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-03 11:55:41,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:41,668 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:41,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:41,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-03 11:55:41,881 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -398668375, now seen corresponding path program 4 times [2021-10-03 11:55:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:41,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099817308] [2021-10-03 11:55:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:41,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:41,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:41,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099817308] [2021-10-03 11:55:41,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099817308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:41,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317452385] [2021-10-03 11:55:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:55:41,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:41,986 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:41,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-03 11:55:42,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:55:42,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-03 11:55:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:42,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317452385] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:42,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:42,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-03 11:55:42,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132504308] [2021-10-03 11:55:42,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-03 11:55:42,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:42,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-03 11:55:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:55:42,339 INFO L87 Difference]: Start difference. First operand 398 states and 1077 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:42,386 INFO L93 Difference]: Finished difference Result 670 states and 1602 transitions. [2021-10-03 11:55:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-03 11:55:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-03 11:55:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:42,392 INFO L225 Difference]: With dead ends: 670 [2021-10-03 11:55:42,392 INFO L226 Difference]: Without dead ends: 670 [2021-10-03 11:55:42,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-03 11:55:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-10-03 11:55:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 462. [2021-10-03 11:55:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.7396963123644253) internal successors, (1263), 461 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1263 transitions. [2021-10-03 11:55:42,412 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1263 transitions. Word has length 36 [2021-10-03 11:55:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:42,413 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1263 transitions. [2021-10-03 11:55:42,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1263 transitions. [2021-10-03 11:55:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:42,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:42,416 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:42,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:42,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-03 11:55:42,627 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:42,628 INFO L82 PathProgramCache]: Analyzing trace with hash 500042068, now seen corresponding path program 5 times [2021-10-03 11:55:42,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:42,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901524591] [2021-10-03 11:55:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:42,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:42,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:42,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901524591] [2021-10-03 11:55:42,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901524591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:42,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031479591] [2021-10-03 11:55:42,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 11:55:42,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:42,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:42,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:42,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-03 11:55:43,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-03 11:55:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-03 11:55:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:43,470 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-10-03 11:55:43,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2021-10-03 11:55:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:43,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031479591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:43,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:43,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-03 11:55:43,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30902704] [2021-10-03 11:55:43,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 11:55:43,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 11:55:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-10-03 11:55:43,507 INFO L87 Difference]: Start difference. First operand 462 states and 1263 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:44,511 INFO L93 Difference]: Finished difference Result 968 states and 2414 transitions. [2021-10-03 11:55:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 11:55:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:44,518 INFO L225 Difference]: With dead ends: 968 [2021-10-03 11:55:44,519 INFO L226 Difference]: Without dead ends: 968 [2021-10-03 11:55:44,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 695.2ms TimeCoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 11:55:44,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-10-03 11:55:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 620. [2021-10-03 11:55:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.756058158319871) internal successors, (1706), 619 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1706 transitions. [2021-10-03 11:55:44,546 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1706 transitions. Word has length 38 [2021-10-03 11:55:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:44,546 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1706 transitions. [2021-10-03 11:55:44,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1706 transitions. [2021-10-03 11:55:44,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:44,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:44,549 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:44,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:44,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:44,763 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -485386747, now seen corresponding path program 3 times [2021-10-03 11:55:44,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:44,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017956654] [2021-10-03 11:55:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:44,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:44,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:44,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017956654] [2021-10-03 11:55:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017956654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:44,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024014925] [2021-10-03 11:55:44,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:55:44,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:44,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:44,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:44,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-03 11:55:45,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 11:55:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-03 11:55:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-03 11:55:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024014925] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:45,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:45,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-03 11:55:45,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296042861] [2021-10-03 11:55:45,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-03 11:55:45,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-03 11:55:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:45,238 INFO L87 Difference]: Start difference. First operand 620 states and 1706 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:45,299 INFO L93 Difference]: Finished difference Result 1116 states and 2839 transitions. [2021-10-03 11:55:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-03 11:55:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:45,308 INFO L225 Difference]: With dead ends: 1116 [2021-10-03 11:55:45,308 INFO L226 Difference]: Without dead ends: 1116 [2021-10-03 11:55:45,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-03 11:55:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-10-03 11:55:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 772. [2021-10-03 11:55:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.762645914396887) internal successors, (2130), 771 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2130 transitions. [2021-10-03 11:55:45,345 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2130 transitions. Word has length 38 [2021-10-03 11:55:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:45,345 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2130 transitions. [2021-10-03 11:55:45,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2130 transitions. [2021-10-03 11:55:45,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:45,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:45,348 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:45,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:45,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:45,563 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:45,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1982656168, now seen corresponding path program 6 times [2021-10-03 11:55:45,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:45,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532656147] [2021-10-03 11:55:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:45,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:45,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:45,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532656147] [2021-10-03 11:55:45,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532656147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:45,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033772233] [2021-10-03 11:55:45,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:55:45,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:45,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:45,885 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:45,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-03 11:55:46,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-03 11:55:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:46,490 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:55:46,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:55:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:46,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033772233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:46,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:46,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-03 11:55:46,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823044502] [2021-10-03 11:55:46,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 11:55:46,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 11:55:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:55:46,524 INFO L87 Difference]: Start difference. First operand 772 states and 2130 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:47,373 INFO L93 Difference]: Finished difference Result 1146 states and 2979 transitions. [2021-10-03 11:55:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 11:55:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:47,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:47,383 INFO L225 Difference]: With dead ends: 1146 [2021-10-03 11:55:47,383 INFO L226 Difference]: Without dead ends: 1146 [2021-10-03 11:55:47,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 558.6ms TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2021-10-03 11:55:47,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-10-03 11:55:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 774. [2021-10-03 11:55:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.7645536869340233) internal successors, (2137), 773 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2137 transitions. [2021-10-03 11:55:47,415 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2137 transitions. Word has length 38 [2021-10-03 11:55:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:47,416 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2137 transitions. [2021-10-03 11:55:47,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2137 transitions. [2021-10-03 11:55:47,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:47,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:47,419 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:47,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-03 11:55:47,634 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -936240390, now seen corresponding path program 7 times [2021-10-03 11:55:47,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:47,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228775305] [2021-10-03 11:55:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:47,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:47,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:47,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228775305] [2021-10-03 11:55:47,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228775305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:47,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900691131] [2021-10-03 11:55:47,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 11:55:47,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:47,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:47,956 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:47,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-03 11:55:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:48,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:55:48,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:55:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:48,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900691131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:48,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:48,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-03 11:55:48,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278344330] [2021-10-03 11:55:48,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 11:55:48,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 11:55:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:55:48,500 INFO L87 Difference]: Start difference. First operand 774 states and 2137 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:49,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:49,192 INFO L93 Difference]: Finished difference Result 1056 states and 2722 transitions. [2021-10-03 11:55:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:55:49,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:49,200 INFO L225 Difference]: With dead ends: 1056 [2021-10-03 11:55:49,200 INFO L226 Difference]: Without dead ends: 1056 [2021-10-03 11:55:49,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-10-03 11:55:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-10-03 11:55:49,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 776. [2021-10-03 11:55:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.766451612903226) internal successors, (2144), 775 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2144 transitions. [2021-10-03 11:55:49,230 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2144 transitions. Word has length 38 [2021-10-03 11:55:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:49,231 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2144 transitions. [2021-10-03 11:55:49,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2144 transitions. [2021-10-03 11:55:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:49,234 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:49,234 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:49,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:49,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:49,448 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -365384108, now seen corresponding path program 8 times [2021-10-03 11:55:49,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:49,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598817621] [2021-10-03 11:55:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:49,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:49,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:49,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598817621] [2021-10-03 11:55:49,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598817621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:49,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293552232] [2021-10-03 11:55:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:49,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:49,786 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:49,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-03 11:55:50,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:55:50,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:50,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:50,432 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:55:50,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:55:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:50,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293552232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:50,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:50,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:55:50,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693162675] [2021-10-03 11:55:50,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:55:50,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:55:50,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:55:50,469 INFO L87 Difference]: Start difference. First operand 776 states and 2144 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:51,258 INFO L93 Difference]: Finished difference Result 1124 states and 2907 transitions. [2021-10-03 11:55:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:55:51,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:51,266 INFO L225 Difference]: With dead ends: 1124 [2021-10-03 11:55:51,267 INFO L226 Difference]: Without dead ends: 1124 [2021-10-03 11:55:51,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2021-10-03 11:55:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-10-03 11:55:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 780. [2021-10-03 11:55:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.767650834403081) internal successors, (2156), 779 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2156 transitions. [2021-10-03 11:55:51,299 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2156 transitions. Word has length 38 [2021-10-03 11:55:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:51,300 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2156 transitions. [2021-10-03 11:55:51,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2156 transitions. [2021-10-03 11:55:51,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:51,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:51,303 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:51,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:51,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-03 11:55:51,518 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1010686630, now seen corresponding path program 9 times [2021-10-03 11:55:51,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:51,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182150494] [2021-10-03 11:55:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:51,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:51,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:51,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182150494] [2021-10-03 11:55:51,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182150494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:51,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810452410] [2021-10-03 11:55:51,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:55:51,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:51,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:51,824 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:51,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-03 11:55:52,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 11:55:52,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:52,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:52,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:55:52,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:55:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:52,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810452410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:52,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:52,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:55:52,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466744032] [2021-10-03 11:55:52,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:55:52,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:55:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:55:52,459 INFO L87 Difference]: Start difference. First operand 780 states and 2156 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:53,090 INFO L93 Difference]: Finished difference Result 1078 states and 2780 transitions. [2021-10-03 11:55:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 11:55:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:53,098 INFO L225 Difference]: With dead ends: 1078 [2021-10-03 11:55:53,098 INFO L226 Difference]: Without dead ends: 1078 [2021-10-03 11:55:53,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2021-10-03 11:55:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-10-03 11:55:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 778. [2021-10-03 11:55:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 2.765765765765766) internal successors, (2149), 777 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 2149 transitions. [2021-10-03 11:55:53,130 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 2149 transitions. Word has length 38 [2021-10-03 11:55:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:53,131 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 2149 transitions. [2021-10-03 11:55:53,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 2149 transitions. [2021-10-03 11:55:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:53,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:53,133 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:53,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:53,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-03 11:55:53,347 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:53,348 INFO L82 PathProgramCache]: Analyzing trace with hash 247684220, now seen corresponding path program 10 times [2021-10-03 11:55:53,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:53,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028755943] [2021-10-03 11:55:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:53,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:53,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:53,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028755943] [2021-10-03 11:55:53,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028755943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:53,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998839691] [2021-10-03 11:55:53,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:55:53,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:53,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:53,634 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:53,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-03 11:55:53,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:55:53,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:53,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:54,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:55:54,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:55:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:54,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998839691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:54,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:54,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-10-03 11:55:54,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616153290] [2021-10-03 11:55:54,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 11:55:54,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 11:55:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-03 11:55:54,168 INFO L87 Difference]: Start difference. First operand 778 states and 2149 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:54,635 INFO L93 Difference]: Finished difference Result 1046 states and 2690 transitions. [2021-10-03 11:55:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:55:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:54,644 INFO L225 Difference]: With dead ends: 1046 [2021-10-03 11:55:54,644 INFO L226 Difference]: Without dead ends: 1046 [2021-10-03 11:55:54,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-10-03 11:55:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-10-03 11:55:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 780. [2021-10-03 11:55:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.7650834403080875) internal successors, (2154), 779 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2154 transitions. [2021-10-03 11:55:54,690 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2154 transitions. Word has length 38 [2021-10-03 11:55:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:54,690 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2154 transitions. [2021-10-03 11:55:54,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2154 transitions. [2021-10-03 11:55:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:54,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:54,694 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:54,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-03 11:55:54,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:54,909 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2010517124, now seen corresponding path program 11 times [2021-10-03 11:55:54,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:54,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816902088] [2021-10-03 11:55:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:54,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:55:55,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:55,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816902088] [2021-10-03 11:55:55,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816902088] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:55:55,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:55:55,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-03 11:55:55,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68087497] [2021-10-03 11:55:55,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:55:55,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:55,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:55:55,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:55:55,216 INFO L87 Difference]: Start difference. First operand 780 states and 2154 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:55,639 INFO L93 Difference]: Finished difference Result 906 states and 2393 transitions. [2021-10-03 11:55:55,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:55:55,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:55,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:55,646 INFO L225 Difference]: With dead ends: 906 [2021-10-03 11:55:55,647 INFO L226 Difference]: Without dead ends: 898 [2021-10-03 11:55:55,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-10-03 11:55:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-10-03 11:55:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 782. [2021-10-03 11:55:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.764404609475032) internal successors, (2159), 781 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2159 transitions. [2021-10-03 11:55:55,672 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2159 transitions. Word has length 38 [2021-10-03 11:55:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:55,672 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2159 transitions. [2021-10-03 11:55:55,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2159 transitions. [2021-10-03 11:55:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:55,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:55,687 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:55,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-03 11:55:55,688 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1821777240, now seen corresponding path program 12 times [2021-10-03 11:55:55,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:55,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028045978] [2021-10-03 11:55:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:55,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:55,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:55,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028045978] [2021-10-03 11:55:55,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028045978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:55,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314170241] [2021-10-03 11:55:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:55:55,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:55,987 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:56,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-03 11:55:56,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-03 11:55:56,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:55:56,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:56,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:56,657 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:55:56,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:55:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314170241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:56,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:56,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:55:56,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613512430] [2021-10-03 11:55:56,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:55:56,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:55:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:55:56,697 INFO L87 Difference]: Start difference. First operand 782 states and 2159 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:57,534 INFO L93 Difference]: Finished difference Result 1195 states and 3126 transitions. [2021-10-03 11:55:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 11:55:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:57,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:57,543 INFO L225 Difference]: With dead ends: 1195 [2021-10-03 11:55:57,543 INFO L226 Difference]: Without dead ends: 1195 [2021-10-03 11:55:57,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 581.1ms TimeCoverageRelationStatistics Valid=238, Invalid=632, Unknown=0, NotChecked=0, Total=870 [2021-10-03 11:55:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-10-03 11:55:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 789. [2021-10-03 11:55:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.763959390862944) internal successors, (2178), 788 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2178 transitions. [2021-10-03 11:55:57,574 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2178 transitions. Word has length 38 [2021-10-03 11:55:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:57,574 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2178 transitions. [2021-10-03 11:55:57,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2178 transitions. [2021-10-03 11:55:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:57,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:57,578 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:57,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:57,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-03 11:55:57,792 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:57,793 INFO L82 PathProgramCache]: Analyzing trace with hash -445706502, now seen corresponding path program 13 times [2021-10-03 11:55:57,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:57,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827829845] [2021-10-03 11:55:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:57,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:58,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:58,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827829845] [2021-10-03 11:55:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827829845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:58,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243255928] [2021-10-03 11:55:58,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 11:55:58,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:58,088 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:58,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-03 11:55:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:55:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:55:58,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:55:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:55:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:58,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243255928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:58,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:55:58,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:55:58,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081550476] [2021-10-03 11:55:58,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:55:58,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:55:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:55:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:55:58,724 INFO L87 Difference]: Start difference. First operand 789 states and 2178 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:55:59,332 INFO L93 Difference]: Finished difference Result 1149 states and 2999 transitions. [2021-10-03 11:55:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:55:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:55:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:55:59,340 INFO L225 Difference]: With dead ends: 1149 [2021-10-03 11:55:59,340 INFO L226 Difference]: Without dead ends: 1149 [2021-10-03 11:55:59,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-10-03 11:55:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-10-03 11:55:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 787. [2021-10-03 11:55:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.762086513994911) internal successors, (2171), 786 states have internal predecessors, (2171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2171 transitions. [2021-10-03 11:55:59,369 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2171 transitions. Word has length 38 [2021-10-03 11:55:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:55:59,369 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 2171 transitions. [2021-10-03 11:55:59,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:55:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2171 transitions. [2021-10-03 11:55:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:55:59,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:55:59,389 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:55:59,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-03 11:55:59,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-03 11:55:59,591 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:55:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:55:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1208708912, now seen corresponding path program 14 times [2021-10-03 11:55:59,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:55:59,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218696172] [2021-10-03 11:55:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:55:59,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:55:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:55:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:55:59,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:55:59,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218696172] [2021-10-03 11:55:59,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218696172] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:55:59,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089974990] [2021-10-03 11:55:59,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:55:59,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:55:59,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:55:59,854 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:55:59,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-03 11:56:00,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:56:00,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:00,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:00,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:00,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089974990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:00,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:00,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-10-03 11:56:00,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211071715] [2021-10-03 11:56:00,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 11:56:00,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 11:56:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-03 11:56:00,455 INFO L87 Difference]: Start difference. First operand 787 states and 2171 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:01,115 INFO L93 Difference]: Finished difference Result 1137 states and 2959 transitions. [2021-10-03 11:56:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 11:56:01,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:01,124 INFO L225 Difference]: With dead ends: 1137 [2021-10-03 11:56:01,124 INFO L226 Difference]: Without dead ends: 1137 [2021-10-03 11:56:01,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-10-03 11:56:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-10-03 11:56:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 789. [2021-10-03 11:56:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 2.761421319796954) internal successors, (2176), 788 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2176 transitions. [2021-10-03 11:56:01,157 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2176 transitions. Word has length 38 [2021-10-03 11:56:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:01,158 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2176 transitions. [2021-10-03 11:56:01,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2176 transitions. [2021-10-03 11:56:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:01,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:01,161 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:01,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-03 11:56:01,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-03 11:56:01,376 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash 828057040, now seen corresponding path program 15 times [2021-10-03 11:56:01,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:01,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348971926] [2021-10-03 11:56:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:01,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:01,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:01,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348971926] [2021-10-03 11:56:01,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348971926] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:01,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:01,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-03 11:56:01,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745453425] [2021-10-03 11:56:01,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:56:01,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:56:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:56:01,709 INFO L87 Difference]: Start difference. First operand 789 states and 2176 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:02,206 INFO L93 Difference]: Finished difference Result 991 states and 2653 transitions. [2021-10-03 11:56:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:56:02,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:02,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:02,214 INFO L225 Difference]: With dead ends: 991 [2021-10-03 11:56:02,214 INFO L226 Difference]: Without dead ends: 983 [2021-10-03 11:56:02,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-10-03 11:56:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-10-03 11:56:02,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 785. [2021-10-03 11:56:02,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.7627551020408165) internal successors, (2166), 784 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2166 transitions. [2021-10-03 11:56:02,240 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2166 transitions. Word has length 38 [2021-10-03 11:56:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:02,240 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2166 transitions. [2021-10-03 11:56:02,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2166 transitions. [2021-10-03 11:56:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:02,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:02,243 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:02,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-03 11:56:02,243 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:02,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1235374918, now seen corresponding path program 16 times [2021-10-03 11:56:02,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:02,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262057727] [2021-10-03 11:56:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:02,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:02,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:02,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262057727] [2021-10-03 11:56:02,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262057727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:02,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270986507] [2021-10-03 11:56:02,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:56:02,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:02,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:02,487 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:02,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-03 11:56:02,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:56:02,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:03,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:03,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270986507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:03,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:03,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-10-03 11:56:03,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485775009] [2021-10-03 11:56:03,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 11:56:03,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 11:56:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-03 11:56:03,100 INFO L87 Difference]: Start difference. First operand 785 states and 2166 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:03,820 INFO L93 Difference]: Finished difference Result 1115 states and 2904 transitions. [2021-10-03 11:56:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:56:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:03,826 INFO L225 Difference]: With dead ends: 1115 [2021-10-03 11:56:03,826 INFO L226 Difference]: Without dead ends: 1115 [2021-10-03 11:56:03,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-10-03 11:56:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-10-03 11:56:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 790. [2021-10-03 11:56:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 2.7604562737642584) internal successors, (2178), 789 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2178 transitions. [2021-10-03 11:56:03,855 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2178 transitions. Word has length 38 [2021-10-03 11:56:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:03,855 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2178 transitions. [2021-10-03 11:56:03,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2178 transitions. [2021-10-03 11:56:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:03,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:03,858 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:03,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-03 11:56:04,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-03 11:56:04,074 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1022826426, now seen corresponding path program 17 times [2021-10-03 11:56:04,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:04,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712587515] [2021-10-03 11:56:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:04,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:04,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:04,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712587515] [2021-10-03 11:56:04,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712587515] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:04,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:04,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-03 11:56:04,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339414860] [2021-10-03 11:56:04,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:56:04,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:56:04,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:56:04,358 INFO L87 Difference]: Start difference. First operand 790 states and 2178 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:04,884 INFO L93 Difference]: Finished difference Result 975 states and 2615 transitions. [2021-10-03 11:56:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 11:56:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:04,889 INFO L225 Difference]: With dead ends: 975 [2021-10-03 11:56:04,889 INFO L226 Difference]: Without dead ends: 967 [2021-10-03 11:56:04,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-10-03 11:56:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-10-03 11:56:04,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 788. [2021-10-03 11:56:04,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.761118170266836) internal successors, (2173), 787 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2173 transitions. [2021-10-03 11:56:04,913 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2173 transitions. Word has length 38 [2021-10-03 11:56:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:04,914 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2173 transitions. [2021-10-03 11:56:04,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:04,914 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2173 transitions. [2021-10-03 11:56:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:04,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:04,916 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:04,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-03 11:56:04,917 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1139147566, now seen corresponding path program 18 times [2021-10-03 11:56:04,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:04,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186473987] [2021-10-03 11:56:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:04,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:05,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:05,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186473987] [2021-10-03 11:56:05,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186473987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:05,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:05,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-03 11:56:05,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160003352] [2021-10-03 11:56:05,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:56:05,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:56:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:56:05,181 INFO L87 Difference]: Start difference. First operand 788 states and 2173 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:05,720 INFO L93 Difference]: Finished difference Result 1077 states and 2855 transitions. [2021-10-03 11:56:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:56:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:05,724 INFO L225 Difference]: With dead ends: 1077 [2021-10-03 11:56:05,725 INFO L226 Difference]: Without dead ends: 1069 [2021-10-03 11:56:05,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-10-03 11:56:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-10-03 11:56:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 791. [2021-10-03 11:56:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.7632911392405064) internal successors, (2183), 790 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2183 transitions. [2021-10-03 11:56:05,749 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2183 transitions. Word has length 38 [2021-10-03 11:56:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:05,750 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2183 transitions. [2021-10-03 11:56:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2183 transitions. [2021-10-03 11:56:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:05,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:05,752 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:05,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-03 11:56:05,753 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1048184282, now seen corresponding path program 19 times [2021-10-03 11:56:05,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:05,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282020943] [2021-10-03 11:56:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:05,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:06,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:06,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282020943] [2021-10-03 11:56:06,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282020943] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:06,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:06,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-03 11:56:06,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851424189] [2021-10-03 11:56:06,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:56:06,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:56:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:56:06,004 INFO L87 Difference]: Start difference. First operand 791 states and 2183 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:06,445 INFO L93 Difference]: Finished difference Result 1111 states and 2905 transitions. [2021-10-03 11:56:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 11:56:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:06,449 INFO L225 Difference]: With dead ends: 1111 [2021-10-03 11:56:06,449 INFO L226 Difference]: Without dead ends: 1098 [2021-10-03 11:56:06,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-10-03 11:56:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-10-03 11:56:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 791. [2021-10-03 11:56:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.759493670886076) internal successors, (2180), 790 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:06,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2180 transitions. [2021-10-03 11:56:06,474 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2180 transitions. Word has length 38 [2021-10-03 11:56:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:06,475 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2180 transitions. [2021-10-03 11:56:06,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2180 transitions. [2021-10-03 11:56:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:06,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:06,478 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:06,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-10-03 11:56:06,478 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1255800988, now seen corresponding path program 20 times [2021-10-03 11:56:06,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:06,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414650430] [2021-10-03 11:56:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:06,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:06,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:06,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414650430] [2021-10-03 11:56:06,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414650430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:06,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523575625] [2021-10-03 11:56:06,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:56:06,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:06,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:06,821 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-03 11:56:07,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:56:07,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:07,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-03 11:56:07,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:07,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-10-03 11:56:07,375 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 11:56:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-03 11:56:07,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:07,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:07,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523575625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:07,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:07,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-10-03 11:56:07,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479034539] [2021-10-03 11:56:07,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:56:07,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:07,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:56:07,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:56:07,540 INFO L87 Difference]: Start difference. First operand 791 states and 2180 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:08,358 INFO L93 Difference]: Finished difference Result 1121 states and 2922 transitions. [2021-10-03 11:56:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 11:56:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:08,361 INFO L225 Difference]: With dead ends: 1121 [2021-10-03 11:56:08,361 INFO L226 Difference]: Without dead ends: 1121 [2021-10-03 11:56:08,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-10-03 11:56:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-10-03 11:56:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 796. [2021-10-03 11:56:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.7572327044025156) internal successors, (2192), 795 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2192 transitions. [2021-10-03 11:56:08,385 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2192 transitions. Word has length 38 [2021-10-03 11:56:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:08,385 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2192 transitions. [2021-10-03 11:56:08,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2192 transitions. [2021-10-03 11:56:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:08,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:08,388 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:08,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:08,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-03 11:56:08,602 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash -798421052, now seen corresponding path program 21 times [2021-10-03 11:56:08,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:08,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198522729] [2021-10-03 11:56:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:08,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:08,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:08,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198522729] [2021-10-03 11:56:08,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198522729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:08,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:08,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:08,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973496780] [2021-10-03 11:56:08,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:08,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:08,925 INFO L87 Difference]: Start difference. First operand 796 states and 2192 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:09,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:09,550 INFO L93 Difference]: Finished difference Result 963 states and 2574 transitions. [2021-10-03 11:56:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:56:09,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:09,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:09,553 INFO L225 Difference]: With dead ends: 963 [2021-10-03 11:56:09,553 INFO L226 Difference]: Without dead ends: 955 [2021-10-03 11:56:09,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-10-03 11:56:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-10-03 11:56:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 794. [2021-10-03 11:56:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.7578814627994954) internal successors, (2187), 793 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 2187 transitions. [2021-10-03 11:56:09,575 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 2187 transitions. Word has length 38 [2021-10-03 11:56:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:09,575 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 2187 transitions. [2021-10-03 11:56:09,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 2187 transitions. [2021-10-03 11:56:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:09,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:09,578 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:09,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-03 11:56:09,579 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash -598099526, now seen corresponding path program 22 times [2021-10-03 11:56:09,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:09,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170318049] [2021-10-03 11:56:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:09,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:09,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:09,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170318049] [2021-10-03 11:56:09,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170318049] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:09,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:09,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:09,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049758359] [2021-10-03 11:56:09,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:09,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:09,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:09,902 INFO L87 Difference]: Start difference. First operand 794 states and 2187 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:10,545 INFO L93 Difference]: Finished difference Result 1061 states and 2804 transitions. [2021-10-03 11:56:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:56:10,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:10,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:10,549 INFO L225 Difference]: With dead ends: 1061 [2021-10-03 11:56:10,549 INFO L226 Difference]: Without dead ends: 1053 [2021-10-03 11:56:10,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-10-03 11:56:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-10-03 11:56:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 797. [2021-10-03 11:56:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 2.7600502512562812) internal successors, (2197), 796 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2197 transitions. [2021-10-03 11:56:10,594 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2197 transitions. Word has length 38 [2021-10-03 11:56:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:10,594 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 2197 transitions. [2021-10-03 11:56:10,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2197 transitions. [2021-10-03 11:56:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:10,597 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:10,597 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:10,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-03 11:56:10,598 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1509535922, now seen corresponding path program 23 times [2021-10-03 11:56:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:10,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95424872] [2021-10-03 11:56:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:10,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:10,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:10,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95424872] [2021-10-03 11:56:10,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95424872] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:10,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:10,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:10,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406048678] [2021-10-03 11:56:10,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:10,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:10,902 INFO L87 Difference]: Start difference. First operand 797 states and 2197 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:11,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:11,415 INFO L93 Difference]: Finished difference Result 1093 states and 2849 transitions. [2021-10-03 11:56:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:56:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:11,419 INFO L225 Difference]: With dead ends: 1093 [2021-10-03 11:56:11,419 INFO L226 Difference]: Without dead ends: 1080 [2021-10-03 11:56:11,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-10-03 11:56:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-10-03 11:56:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 791. [2021-10-03 11:56:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 2.759493670886076) internal successors, (2180), 790 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2180 transitions. [2021-10-03 11:56:11,442 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2180 transitions. Word has length 38 [2021-10-03 11:56:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:11,442 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 2180 transitions. [2021-10-03 11:56:11,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2180 transitions. [2021-10-03 11:56:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:11,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:11,444 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:11,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-10-03 11:56:11,445 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash -758692492, now seen corresponding path program 24 times [2021-10-03 11:56:11,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:11,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538072947] [2021-10-03 11:56:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:11,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:11,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:11,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538072947] [2021-10-03 11:56:11,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538072947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:11,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059633753] [2021-10-03 11:56:11,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:56:11,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:11,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:11,818 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:11,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-03 11:56:12,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-03 11:56:12,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 11:56:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:12,575 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 11:56:12,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-03 11:56:12,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:56:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:12,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059633753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:12,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:12,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-03 11:56:12,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571180438] [2021-10-03 11:56:12,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 11:56:12,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:12,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 11:56:12,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-03 11:56:12,873 INFO L87 Difference]: Start difference. First operand 791 states and 2180 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:13,851 INFO L93 Difference]: Finished difference Result 1183 states and 3101 transitions. [2021-10-03 11:56:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 11:56:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:13,854 INFO L225 Difference]: With dead ends: 1183 [2021-10-03 11:56:13,855 INFO L226 Difference]: Without dead ends: 1183 [2021-10-03 11:56:13,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 862.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 11:56:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-10-03 11:56:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 795. [2021-10-03 11:56:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.760705289672544) internal successors, (2192), 794 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2192 transitions. [2021-10-03 11:56:13,876 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2192 transitions. Word has length 38 [2021-10-03 11:56:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:13,877 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2192 transitions. [2021-10-03 11:56:13,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2192 transitions. [2021-10-03 11:56:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:13,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:13,879 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:13,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:14,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-03 11:56:14,093 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 639809308, now seen corresponding path program 25 times [2021-10-03 11:56:14,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:14,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139574546] [2021-10-03 11:56:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:14,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:14,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:14,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139574546] [2021-10-03 11:56:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139574546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:14,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244709585] [2021-10-03 11:56:14,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 11:56:14,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:14,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:14,443 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:14,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-03 11:56:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-03 11:56:14,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:14,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2021-10-03 11:56:15,098 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 11:56:15,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-03 11:56:15,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:15,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:15,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244709585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:15,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:15,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-10-03 11:56:15,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532157215] [2021-10-03 11:56:15,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 11:56:15,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:15,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 11:56:15,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:56:15,300 INFO L87 Difference]: Start difference. First operand 795 states and 2192 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:16,125 INFO L93 Difference]: Finished difference Result 1075 states and 2789 transitions. [2021-10-03 11:56:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 11:56:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:16,128 INFO L225 Difference]: With dead ends: 1075 [2021-10-03 11:56:16,128 INFO L226 Difference]: Without dead ends: 1075 [2021-10-03 11:56:16,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-10-03 11:56:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-10-03 11:56:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 793. [2021-10-03 11:56:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 2.7588383838383836) internal successors, (2185), 792 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2185 transitions. [2021-10-03 11:56:16,154 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2185 transitions. Word has length 38 [2021-10-03 11:56:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:16,154 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2185 transitions. [2021-10-03 11:56:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2185 transitions. [2021-10-03 11:56:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:16,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:16,157 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:16,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:16,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-03 11:56:16,371 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:16,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1882766964, now seen corresponding path program 26 times [2021-10-03 11:56:16,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:16,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602180450] [2021-10-03 11:56:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:16,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:16,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:16,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602180450] [2021-10-03 11:56:16,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602180450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:16,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453191189] [2021-10-03 11:56:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:56:16,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:16,697 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:16,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-03 11:56:17,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:56:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 11:56:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:17,450 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-03 11:56:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-03 11:56:17,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:17,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:17,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453191189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:17,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:17,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-03 11:56:17,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431200128] [2021-10-03 11:56:17,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 11:56:17,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:17,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 11:56:17,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-10-03 11:56:17,638 INFO L87 Difference]: Start difference. First operand 793 states and 2185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:18,453 INFO L93 Difference]: Finished difference Result 1083 states and 2807 transitions. [2021-10-03 11:56:18,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:56:18,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:18,457 INFO L225 Difference]: With dead ends: 1083 [2021-10-03 11:56:18,458 INFO L226 Difference]: Without dead ends: 1083 [2021-10-03 11:56:18,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 11:56:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-10-03 11:56:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 795. [2021-10-03 11:56:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.7581863979848866) internal successors, (2190), 794 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2190 transitions. [2021-10-03 11:56:18,483 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2190 transitions. Word has length 38 [2021-10-03 11:56:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:18,483 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2190 transitions. [2021-10-03 11:56:18,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2190 transitions. [2021-10-03 11:56:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:18,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:18,486 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:18,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-03 11:56:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:18,700 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash -375434380, now seen corresponding path program 27 times [2021-10-03 11:56:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:18,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899590629] [2021-10-03 11:56:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:18,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:19,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:19,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899590629] [2021-10-03 11:56:19,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899590629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:19,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:19,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:19,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395221262] [2021-10-03 11:56:19,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:19,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:19,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:19,092 INFO L87 Difference]: Start difference. First operand 795 states and 2190 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:19,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:19,744 INFO L93 Difference]: Finished difference Result 921 states and 2443 transitions. [2021-10-03 11:56:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 11:56:19,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:19,748 INFO L225 Difference]: With dead ends: 921 [2021-10-03 11:56:19,748 INFO L226 Difference]: Without dead ends: 913 [2021-10-03 11:56:19,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-10-03 11:56:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-10-03 11:56:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 788. [2021-10-03 11:56:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.761118170266836) internal successors, (2173), 787 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2173 transitions. [2021-10-03 11:56:19,769 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2173 transitions. Word has length 38 [2021-10-03 11:56:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2173 transitions. [2021-10-03 11:56:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2173 transitions. [2021-10-03 11:56:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:19,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:19,771 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:19,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-10-03 11:56:19,772 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -23993772, now seen corresponding path program 28 times [2021-10-03 11:56:19,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:19,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20469101] [2021-10-03 11:56:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:19,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:20,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:20,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20469101] [2021-10-03 11:56:20,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20469101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:20,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819283112] [2021-10-03 11:56:20,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:56:20,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:20,101 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:20,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-03 11:56:20,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:56:20,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:20,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-03 11:56:20,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:20,953 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-10-03 11:56:20,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-10-03 11:56:21,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:21,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:21,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819283112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:21,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:21,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-10-03 11:56:21,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524901621] [2021-10-03 11:56:21,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-03 11:56:21,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:21,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-03 11:56:21,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-10-03 11:56:21,106 INFO L87 Difference]: Start difference. First operand 788 states and 2173 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:22,177 INFO L93 Difference]: Finished difference Result 1050 states and 2723 transitions. [2021-10-03 11:56:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:56:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:22,180 INFO L225 Difference]: With dead ends: 1050 [2021-10-03 11:56:22,180 INFO L226 Difference]: Without dead ends: 1050 [2021-10-03 11:56:22,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 11:56:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-10-03 11:56:22,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 790. [2021-10-03 11:56:22,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 2.7604562737642584) internal successors, (2178), 789 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2178 transitions. [2021-10-03 11:56:22,204 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2178 transitions. Word has length 38 [2021-10-03 11:56:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:22,204 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2178 transitions. [2021-10-03 11:56:22,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2178 transitions. [2021-10-03 11:56:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:22,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:22,206 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:22,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:22,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:22,421 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2078215812, now seen corresponding path program 29 times [2021-10-03 11:56:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:22,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626332099] [2021-10-03 11:56:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:22,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:22,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:22,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626332099] [2021-10-03 11:56:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626332099] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:22,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:22,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:22,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110962279] [2021-10-03 11:56:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:22,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:22,759 INFO L87 Difference]: Start difference. First operand 790 states and 2178 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:23,484 INFO L93 Difference]: Finished difference Result 896 states and 2381 transitions. [2021-10-03 11:56:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 11:56:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:23,489 INFO L225 Difference]: With dead ends: 896 [2021-10-03 11:56:23,489 INFO L226 Difference]: Without dead ends: 888 [2021-10-03 11:56:23,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-10-03 11:56:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-10-03 11:56:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 788. [2021-10-03 11:56:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.761118170266836) internal successors, (2173), 787 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2173 transitions. [2021-10-03 11:56:23,507 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2173 transitions. Word has length 38 [2021-10-03 11:56:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:23,507 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2173 transitions. [2021-10-03 11:56:23,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2173 transitions. [2021-10-03 11:56:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:23,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:23,509 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-10-03 11:56:23,510 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1877894286, now seen corresponding path program 30 times [2021-10-03 11:56:23,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:23,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755858850] [2021-10-03 11:56:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:23,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:23,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:23,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755858850] [2021-10-03 11:56:23,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755858850] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:23,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:23,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:23,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516470935] [2021-10-03 11:56:23,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:23,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:23,852 INFO L87 Difference]: Start difference. First operand 788 states and 2173 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:24,486 INFO L93 Difference]: Finished difference Result 970 states and 2560 transitions. [2021-10-03 11:56:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:56:24,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:24,490 INFO L225 Difference]: With dead ends: 970 [2021-10-03 11:56:24,491 INFO L226 Difference]: Without dead ends: 962 [2021-10-03 11:56:24,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-10-03 11:56:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-10-03 11:56:24,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 788. [2021-10-03 11:56:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 2.761118170266836) internal successors, (2173), 787 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2173 transitions. [2021-10-03 11:56:24,512 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2173 transitions. Word has length 38 [2021-10-03 11:56:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:24,513 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2173 transitions. [2021-10-03 11:56:24,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2173 transitions. [2021-10-03 11:56:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:24,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:24,515 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:24,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-10-03 11:56:24,517 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:24,518 INFO L82 PathProgramCache]: Analyzing trace with hash 229741162, now seen corresponding path program 31 times [2021-10-03 11:56:24,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:24,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658820896] [2021-10-03 11:56:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:24,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:24,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:24,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658820896] [2021-10-03 11:56:24,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658820896] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:24,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:24,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-03 11:56:24,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101135636] [2021-10-03 11:56:24,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-03 11:56:24,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:24,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-03 11:56:24,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-03 11:56:24,926 INFO L87 Difference]: Start difference. First operand 788 states and 2173 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:25,590 INFO L93 Difference]: Finished difference Result 956 states and 2526 transitions. [2021-10-03 11:56:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 11:56:25,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:25,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:25,595 INFO L225 Difference]: With dead ends: 956 [2021-10-03 11:56:25,595 INFO L226 Difference]: Without dead ends: 942 [2021-10-03 11:56:25,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-10-03 11:56:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-10-03 11:56:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 782. [2021-10-03 11:56:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.759282970550576) internal successors, (2155), 781 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2155 transitions. [2021-10-03 11:56:25,616 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2155 transitions. Word has length 38 [2021-10-03 11:56:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:25,616 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2155 transitions. [2021-10-03 11:56:25,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2155 transitions. [2021-10-03 11:56:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:25,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:25,618 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:25,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-10-03 11:56:25,619 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1313227296, now seen corresponding path program 32 times [2021-10-03 11:56:25,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:25,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141592078] [2021-10-03 11:56:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:25,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:25,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:25,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141592078] [2021-10-03 11:56:25,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141592078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:25,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221371896] [2021-10-03 11:56:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 11:56:25,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:25,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:25,885 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:25,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-03 11:56:26,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 11:56:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:26,784 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:26,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-10-03 11:56:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:26,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221371896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:26,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:26,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:56:26,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434518174] [2021-10-03 11:56:26,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:56:26,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:26,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:56:26,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:56:26,836 INFO L87 Difference]: Start difference. First operand 782 states and 2155 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:27,791 INFO L93 Difference]: Finished difference Result 1200 states and 3053 transitions. [2021-10-03 11:56:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 11:56:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:27,794 INFO L225 Difference]: With dead ends: 1200 [2021-10-03 11:56:27,794 INFO L226 Difference]: Without dead ends: 1200 [2021-10-03 11:56:27,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2021-10-03 11:56:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-10-03 11:56:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 784. [2021-10-03 11:56:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.76117496807152) internal successors, (2162), 783 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2162 transitions. [2021-10-03 11:56:27,815 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2162 transitions. Word has length 38 [2021-10-03 11:56:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:27,815 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2162 transitions. [2021-10-03 11:56:27,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2162 transitions. [2021-10-03 11:56:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:27,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:27,818 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:27,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:28,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-03 11:56:28,031 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 169386804, now seen corresponding path program 33 times [2021-10-03 11:56:28,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:28,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444789135] [2021-10-03 11:56:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:28,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:28,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:28,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444789135] [2021-10-03 11:56:28,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444789135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:28,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155179118] [2021-10-03 11:56:28,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:56:28,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:28,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:28,337 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:28,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-03 11:56:28,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 11:56:28,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:28,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:28,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:29,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:56:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:29,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155179118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:29,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:29,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-03 11:56:29,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635579906] [2021-10-03 11:56:29,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 11:56:29,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:29,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 11:56:29,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:56:29,301 INFO L87 Difference]: Start difference. First operand 784 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:30,208 INFO L93 Difference]: Finished difference Result 1154 states and 2988 transitions. [2021-10-03 11:56:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-03 11:56:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:30,213 INFO L225 Difference]: With dead ends: 1154 [2021-10-03 11:56:30,213 INFO L226 Difference]: Without dead ends: 1154 [2021-10-03 11:56:30,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 578.8ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-10-03 11:56:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-10-03 11:56:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 786. [2021-10-03 11:56:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.7630573248407644) internal successors, (2169), 785 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2169 transitions. [2021-10-03 11:56:30,235 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2169 transitions. Word has length 38 [2021-10-03 11:56:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:30,235 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 2169 transitions. [2021-10-03 11:56:30,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2169 transitions. [2021-10-03 11:56:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:30,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:30,238 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:30,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:30,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-03 11:56:30,453 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1545457542, now seen corresponding path program 34 times [2021-10-03 11:56:30,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:30,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962860289] [2021-10-03 11:56:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:30,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:30,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:30,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962860289] [2021-10-03 11:56:30,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962860289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:30,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553855702] [2021-10-03 11:56:30,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:56:30,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:30,753 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:30,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-03 11:56:31,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:56:31,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:31,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:31,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:31,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553855702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:31,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:31,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-03 11:56:31,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106166794] [2021-10-03 11:56:31,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 11:56:31,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:31,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 11:56:31,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:56:31,582 INFO L87 Difference]: Start difference. First operand 786 states and 2169 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:32,289 INFO L93 Difference]: Finished difference Result 1064 states and 2731 transitions. [2021-10-03 11:56:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:56:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:32,311 INFO L225 Difference]: With dead ends: 1064 [2021-10-03 11:56:32,311 INFO L226 Difference]: Without dead ends: 1064 [2021-10-03 11:56:32,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2021-10-03 11:56:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-10-03 11:56:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 782. [2021-10-03 11:56:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.759282970550576) internal successors, (2155), 781 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2155 transitions. [2021-10-03 11:56:32,327 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2155 transitions. Word has length 38 [2021-10-03 11:56:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:32,327 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2155 transitions. [2021-10-03 11:56:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2155 transitions. [2021-10-03 11:56:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:32,330 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:32,330 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:32,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:32,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-03 11:56:32,545 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:32,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2116313824, now seen corresponding path program 35 times [2021-10-03 11:56:32,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:32,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382481890] [2021-10-03 11:56:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:32,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:32,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:32,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382481890] [2021-10-03 11:56:32,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382481890] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:32,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390518349] [2021-10-03 11:56:32,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 11:56:32,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:32,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:32,812 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:32,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-03 11:56:33,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-03 11:56:33,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:33,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:33,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:33,716 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:33,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:56:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390518349] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:33,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:33,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:56:33,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562865923] [2021-10-03 11:56:33,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:56:33,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:56:33,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:56:33,761 INFO L87 Difference]: Start difference. First operand 782 states and 2155 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:34,533 INFO L93 Difference]: Finished difference Result 1100 states and 2842 transitions. [2021-10-03 11:56:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 11:56:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:34,536 INFO L225 Difference]: With dead ends: 1100 [2021-10-03 11:56:34,536 INFO L226 Difference]: Without dead ends: 1100 [2021-10-03 11:56:34,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2021-10-03 11:56:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-10-03 11:56:34,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 784. [2021-10-03 11:56:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.76117496807152) internal successors, (2162), 783 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2162 transitions. [2021-10-03 11:56:34,553 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2162 transitions. Word has length 38 [2021-10-03 11:56:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:34,553 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2162 transitions. [2021-10-03 11:56:34,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2162 transitions. [2021-10-03 11:56:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:34,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:34,556 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:34,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:34,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:34,771 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:34,771 INFO L82 PathProgramCache]: Analyzing trace with hash -802582734, now seen corresponding path program 36 times [2021-10-03 11:56:34,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:34,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610859399] [2021-10-03 11:56:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:34,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:35,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:35,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610859399] [2021-10-03 11:56:35,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610859399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:35,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257435832] [2021-10-03 11:56:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:56:35,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:35,090 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:35,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-03 11:56:35,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-03 11:56:35,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:35,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:35,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:35,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:35,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:35,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257435832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:35,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:35,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:56:35,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632710321] [2021-10-03 11:56:35,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:56:35,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:56:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:56:35,976 INFO L87 Difference]: Start difference. First operand 784 states and 2162 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:36,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:36,504 INFO L93 Difference]: Finished difference Result 1054 states and 2715 transitions. [2021-10-03 11:56:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 11:56:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:36,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:36,507 INFO L225 Difference]: With dead ends: 1054 [2021-10-03 11:56:36,508 INFO L226 Difference]: Without dead ends: 1054 [2021-10-03 11:56:36,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 406.7ms TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-10-03 11:56:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-10-03 11:56:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 782. [2021-10-03 11:56:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.759282970550576) internal successors, (2155), 781 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2155 transitions. [2021-10-03 11:56:36,522 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2155 transitions. Word has length 38 [2021-10-03 11:56:36,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:36,522 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2155 transitions. [2021-10-03 11:56:36,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2155 transitions. [2021-10-03 11:56:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:36,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:36,524 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:36,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-03 11:56:36,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:36,725 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1565585144, now seen corresponding path program 37 times [2021-10-03 11:56:36,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:36,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332380994] [2021-10-03 11:56:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:36,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:36,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:36,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332380994] [2021-10-03 11:56:36,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332380994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:36,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317966766] [2021-10-03 11:56:36,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 11:56:36,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:36,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:36,967 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:36,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-03 11:56:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:37,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:37,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-10-03 11:56:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:37,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317966766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:37,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:37,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-10-03 11:56:37,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617722011] [2021-10-03 11:56:37,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 11:56:37,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 11:56:37,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-03 11:56:37,809 INFO L87 Difference]: Start difference. First operand 782 states and 2155 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:38,234 INFO L93 Difference]: Finished difference Result 1022 states and 2625 transitions. [2021-10-03 11:56:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 11:56:38,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:38,237 INFO L225 Difference]: With dead ends: 1022 [2021-10-03 11:56:38,237 INFO L226 Difference]: Without dead ends: 1022 [2021-10-03 11:56:38,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-10-03 11:56:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-10-03 11:56:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 782. [2021-10-03 11:56:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.759282970550576) internal successors, (2155), 781 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2155 transitions. [2021-10-03 11:56:38,270 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2155 transitions. Word has length 38 [2021-10-03 11:56:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:38,271 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2155 transitions. [2021-10-03 11:56:38,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2155 transitions. [2021-10-03 11:56:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:38,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:38,273 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:38,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:38,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:38,488 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash 471180808, now seen corresponding path program 38 times [2021-10-03 11:56:38,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:38,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594809161] [2021-10-03 11:56:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:38,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-03 11:56:38,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:38,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594809161] [2021-10-03 11:56:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594809161] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 11:56:38,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 11:56:38,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-03 11:56:38,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400769968] [2021-10-03 11:56:38,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-03 11:56:38,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-03 11:56:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-03 11:56:38,743 INFO L87 Difference]: Start difference. First operand 782 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:39,191 INFO L93 Difference]: Finished difference Result 890 states and 2342 transitions. [2021-10-03 11:56:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 11:56:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:39,194 INFO L225 Difference]: With dead ends: 890 [2021-10-03 11:56:39,194 INFO L226 Difference]: Without dead ends: 882 [2021-10-03 11:56:39,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-10-03 11:56:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-03 11:56:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 774. [2021-10-03 11:56:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.759379042690815) internal successors, (2133), 773 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2133 transitions. [2021-10-03 11:56:39,208 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2133 transitions. Word has length 38 [2021-10-03 11:56:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:39,209 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2133 transitions. [2021-10-03 11:56:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2133 transitions. [2021-10-03 11:56:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:39,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:39,211 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:39,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-10-03 11:56:39,212 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:39,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -878086838, now seen corresponding path program 39 times [2021-10-03 11:56:39,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:39,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128575909] [2021-10-03 11:56:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:39,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:39,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:39,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128575909] [2021-10-03 11:56:39,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128575909] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:39,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836921073] [2021-10-03 11:56:39,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 11:56:39,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:39,483 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:39,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-03 11:56:40,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 11:56:40,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:40,582 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-10-03 11:56:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:40,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836921073] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:40,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:40,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-10-03 11:56:40,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276356100] [2021-10-03 11:56:40,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 11:56:40,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:40,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 11:56:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-03 11:56:40,637 INFO L87 Difference]: Start difference. First operand 774 states and 2133 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:41,794 INFO L93 Difference]: Finished difference Result 1216 states and 3098 transitions. [2021-10-03 11:56:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 11:56:41,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:41,797 INFO L225 Difference]: With dead ends: 1216 [2021-10-03 11:56:41,797 INFO L226 Difference]: Without dead ends: 1216 [2021-10-03 11:56:41,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 11:56:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-10-03 11:56:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 772. [2021-10-03 11:56:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 2.7600518806744487) internal successors, (2128), 771 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2128 transitions. [2021-10-03 11:56:41,812 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2128 transitions. Word has length 38 [2021-10-03 11:56:41,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:41,812 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2128 transitions. [2021-10-03 11:56:41,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:41,812 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2128 transitions. [2021-10-03 11:56:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:41,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:41,814 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:41,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-03 11:56:42,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:42,015 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash 604527262, now seen corresponding path program 40 times [2021-10-03 11:56:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:42,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016995652] [2021-10-03 11:56:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:42,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:42,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016995652] [2021-10-03 11:56:42,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016995652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:42,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626567395] [2021-10-03 11:56:42,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 11:56:42,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:42,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:42,298 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:42,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-03 11:56:43,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 11:56:43,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:43,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:43,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:43,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:43,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-10-03 11:56:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:43,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626567395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:43,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:43,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-10-03 11:56:43,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563379083] [2021-10-03 11:56:43,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 11:56:43,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 11:56:43,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-03 11:56:43,388 INFO L87 Difference]: Start difference. First operand 772 states and 2128 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:44,391 INFO L93 Difference]: Finished difference Result 1158 states and 3003 transitions. [2021-10-03 11:56:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 11:56:44,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:44,394 INFO L225 Difference]: With dead ends: 1158 [2021-10-03 11:56:44,394 INFO L226 Difference]: Without dead ends: 1158 [2021-10-03 11:56:44,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 11:56:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-10-03 11:56:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 770. [2021-10-03 11:56:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.7607282184655397) internal successors, (2123), 769 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2123 transitions. [2021-10-03 11:56:44,407 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2123 transitions. Word has length 38 [2021-10-03 11:56:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:44,407 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2123 transitions. [2021-10-03 11:56:44,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2123 transitions. [2021-10-03 11:56:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:44,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:44,409 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:44,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:44,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:44,610 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1980598000, now seen corresponding path program 41 times [2021-10-03 11:56:44,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:44,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417677894] [2021-10-03 11:56:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:44,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:44,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:44,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417677894] [2021-10-03 11:56:44,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417677894] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:44,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351294917] [2021-10-03 11:56:44,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 11:56:44,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:44,905 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:44,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-03 11:56:45,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-03 11:56:45,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:45,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-03 11:56:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:45,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-03 11:56:45,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-10-03 11:56:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-03 11:56:46,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351294917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:46,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:46,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-03 11:56:46,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301950592] [2021-10-03 11:56:46,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 11:56:46,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 11:56:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-10-03 11:56:46,010 INFO L87 Difference]: Start difference. First operand 770 states and 2123 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:46,821 INFO L93 Difference]: Finished difference Result 1068 states and 2746 transitions. [2021-10-03 11:56:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-03 11:56:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:46,823 INFO L225 Difference]: With dead ends: 1068 [2021-10-03 11:56:46,823 INFO L226 Difference]: Without dead ends: 1068 [2021-10-03 11:56:46,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=299, Invalid=961, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 11:56:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-03 11:56:46,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 760. [2021-10-03 11:56:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.753623188405797) internal successors, (2090), 759 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2090 transitions. [2021-10-03 11:56:46,838 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2090 transitions. Word has length 38 [2021-10-03 11:56:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:46,838 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2090 transitions. [2021-10-03 11:56:46,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:46,838 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2090 transitions. [2021-10-03 11:56:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-03 11:56:46,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:46,840 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:46,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-03 11:56:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-03 11:56:47,048 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 916239700, now seen corresponding path program 42 times [2021-10-03 11:56:47,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:47,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832195503] [2021-10-03 11:56:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:47,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-03 11:56:47,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832195503] [2021-10-03 11:56:47,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832195503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:47,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141152864] [2021-10-03 11:56:47,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 11:56:47,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:47,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:47,308 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:47,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-03 11:56:48,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-03 11:56:48,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 11:56:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 11:56:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:48,482 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:48,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-10-03 11:56:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-03 11:56:48,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141152864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:48,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:48,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-10-03 11:56:48,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980913993] [2021-10-03 11:56:48,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 11:56:48,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 11:56:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-03 11:56:48,539 INFO L87 Difference]: Start difference. First operand 760 states and 2090 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:49,788 INFO L93 Difference]: Finished difference Result 1578 states and 4075 transitions. [2021-10-03 11:56:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 11:56:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-03 11:56:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:49,793 INFO L225 Difference]: With dead ends: 1578 [2021-10-03 11:56:49,794 INFO L226 Difference]: Without dead ends: 1578 [2021-10-03 11:56:49,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=331, Invalid=1001, Unknown=0, NotChecked=0, Total=1332 [2021-10-03 11:56:49,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-10-03 11:56:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 704. [2021-10-03 11:56:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 2.716927453769559) internal successors, (1910), 703 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1910 transitions. [2021-10-03 11:56:49,821 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1910 transitions. Word has length 38 [2021-10-03 11:56:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:49,822 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 1910 transitions. [2021-10-03 11:56:49,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1910 transitions. [2021-10-03 11:56:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-03 11:56:49,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:49,825 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:49,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:50,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-03 11:56:50,040 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:50,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1718080299, now seen corresponding path program 1 times [2021-10-03 11:56:50,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:50,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917522407] [2021-10-03 11:56:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:50,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-03 11:56:50,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 11:56:50,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917522407] [2021-10-03 11:56:50,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917522407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:50,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814977343] [2021-10-03 11:56:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:50,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:50,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 11:56:50,551 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 11:56:50,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-03 11:56:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 11:56:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 11:56:51,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 11:56:51,815 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-03 11:56:51,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 30 [2021-10-03 11:56:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-03 11:56:51,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814977343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 11:56:51,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 11:56:51,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-10-03 11:56:51,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460359581] [2021-10-03 11:56:51,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 11:56:51,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 11:56:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 11:56:51,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-03 11:56:51,873 INFO L87 Difference]: Start difference. First operand 704 states and 1910 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 11:56:53,009 INFO L93 Difference]: Finished difference Result 1036 states and 2694 transitions. [2021-10-03 11:56:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 11:56:53,010 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-03 11:56:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 11:56:53,012 INFO L225 Difference]: With dead ends: 1036 [2021-10-03 11:56:53,012 INFO L226 Difference]: Without dead ends: 1036 [2021-10-03 11:56:53,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 11:56:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-10-03 11:56:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 858. [2021-10-03 11:56:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.750291715285881) internal successors, (2357), 857 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2357 transitions. [2021-10-03 11:56:53,026 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2357 transitions. Word has length 42 [2021-10-03 11:56:53,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 11:56:53,026 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2357 transitions. [2021-10-03 11:56:53,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 11:56:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2357 transitions. [2021-10-03 11:56:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-03 11:56:53,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 11:56:53,028 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 11:56:53,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-03 11:56:53,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 11:56:53,229 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 11:56:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 11:56:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1269197177, now seen corresponding path program 2 times [2021-10-03 11:56:53,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 11:56:53,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979011280] [2021-10-03 11:56:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 11:56:53,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 11:56:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-03 11:56:53,298 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-03 11:56:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-03 11:56:53,401 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-03 11:56:53,402 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-03 11:56:53,403 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 11:56:53,405 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 11:56:53,406 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 11:56:53,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-10-03 11:56:53,414 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 11:56:53,415 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 11:56:53,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 11:56:53 BasicIcfg [2021-10-03 11:56:53,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 11:56:53,539 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 11:56:53,539 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 11:56:53,539 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 11:56:53,540 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 11:55:27" (3/4) ... [2021-10-03 11:56:53,542 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-03 11:56:53,667 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 11:56:53,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 11:56:53,669 INFO L168 Benchmark]: Toolchain (without parser) took 87246.02 ms. Allocated memory was 54.5 MB in the beginning and 436.2 MB in the end (delta: 381.7 MB). Free memory was 39.9 MB in the beginning and 298.4 MB in the end (delta: -258.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 16.1 GB. [2021-10-03 11:56:53,669 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 44.0 MB. Free memory was 27.4 MB in the beginning and 27.4 MB in the end (delta: 32.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 11:56:53,669 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.54 ms. Allocated memory is still 54.5 MB. Free memory was 39.6 MB in the beginning and 29.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-03 11:56:53,670 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.55 ms. Allocated memory is still 54.5 MB. Free memory was 29.2 MB in the beginning and 27.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 11:56:53,670 INFO L168 Benchmark]: Boogie Preprocessor took 62.00 ms. Allocated memory is still 54.5 MB. Free memory was 27.2 MB in the beginning and 25.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 11:56:53,671 INFO L168 Benchmark]: RCFGBuilder took 645.28 ms. Allocated memory is still 54.5 MB. Free memory was 25.8 MB in the beginning and 25.6 MB in the end (delta: 159.7 kB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. [2021-10-03 11:56:53,671 INFO L168 Benchmark]: TraceAbstraction took 85973.85 ms. Allocated memory was 54.5 MB in the beginning and 436.2 MB in the end (delta: 381.7 MB). Free memory was 25.1 MB in the beginning and 308.9 MB in the end (delta: -283.8 MB). Peak memory consumption was 99.4 MB. Max. memory is 16.1 GB. [2021-10-03 11:56:53,671 INFO L168 Benchmark]: Witness Printer took 128.90 ms. Allocated memory is still 436.2 MB. Free memory was 308.9 MB in the beginning and 298.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-03 11:56:53,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 44.0 MB. Free memory was 27.4 MB in the beginning and 27.4 MB in the end (delta: 32.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.54 ms. Allocated memory is still 54.5 MB. Free memory was 39.6 MB in the beginning and 29.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.55 ms. Allocated memory is still 54.5 MB. Free memory was 29.2 MB in the beginning and 27.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.00 ms. Allocated memory is still 54.5 MB. Free memory was 27.2 MB in the beginning and 25.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 645.28 ms. Allocated memory is still 54.5 MB. Free memory was 25.8 MB in the beginning and 25.6 MB in the end (delta: 159.7 kB). Peak memory consumption was 3.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 85973.85 ms. Allocated memory was 54.5 MB in the beginning and 436.2 MB in the end (delta: 381.7 MB). Free memory was 25.1 MB in the beginning and 308.9 MB in the end (delta: -283.8 MB). Peak memory consumption was 99.4 MB. Max. memory is 16.1 GB. * Witness Printer took 128.90 ms. Allocated memory is still 436.2 MB. Free memory was 308.9 MB in the beginning and 298.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4449.3ms, 147 PlacesBefore, 29 PlacesAfterwards, 157 TransitionsBefore, 28 TransitionsAfterwards, 1512 CoEnabledTransitionPairs, 6 FixpointIterations, 93 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 6 ConcurrentYvCompositions, 11 ChoiceCompositions, 159 TotalNumberOfCompositions, 2112 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1616, positive: 1537, positive conditional: 0, positive unconditional: 1537, negative: 79, negative conditional: 0, negative unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1042, positive: 1018, positive conditional: 0, positive unconditional: 1018, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1042, positive: 1018, positive conditional: 0, positive unconditional: 1018, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 66, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 66, negative conditional: 0, negative unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1616, positive: 519, positive conditional: 0, positive unconditional: 519, negative: 55, negative conditional: 0, negative unconditional: 55, unknown: 1042, unknown conditional: 0, unknown unconditional: 1042] , Statistics on independence cache: Total cache size (in pairs): 73, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] 0 int *a1, *a2; [L18] 0 int res1, res2; [L19] 0 _Bool isNull1, isNull2; [L48] 0 pthread_t t1, t2; [L14] COND FALSE 0 !(!cond) [L70] 0 int* arr = (int*)malloc(sizeof(int) * size); [L71] 0 int i = 0; VAL [a1={0:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={0:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={0:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={0:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={0:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={0:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND FALSE 0 !(i < size) [L74] 0 return arr; [L50] 0 a1 = create_fresh_int_array(5) [L14] COND FALSE 0 !(!cond) [L70] 0 int* arr = (int*)malloc(sizeof(int) * size); [L71] 0 int i = 0; VAL [a1={2:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={2:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={2:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={2:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={2:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND TRUE 0 i < size [L72] 0 arr[i] = __VERIFIER_nondet_int() [L71] 0 i++ VAL [a1={2:0}, a2={0:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L71] COND FALSE 0 !(i < size) [L74] 0 return arr; [L51] 0 a2 = create_fresh_int_array(5) [L52] 0 isNull1 = __VERIFIER_nondet_bool() [L53] 0 isNull2 = __VERIFIER_nondet_bool() [L56] FCALL, FORK 0 pthread_create(&t1, NULL, thread1, NULL) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L24] 1 int i = 0; [L14] COND FALSE 1 !(!cond) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L57] FCALL, FORK 0 pthread_create(&t2, NULL, thread2, NULL) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L36] 2 int i = 0; [L14] COND FALSE 2 !(!cond) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L38] COND TRUE 2 !isNull1 && i < 5 [L39] EXPR 2 a2[i] [L39] EXPR 2 a1[i] [L39] 2 res1 = a2[i] - a1[i] [L40] COND FALSE 2 !(res1 == 0) [L43] 2 i++ VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=-1, res2=0] [L38] COND TRUE 2 !isNull1 && i < 5 [L39] EXPR 2 a2[i] [L39] EXPR 2 a1[i] [L39] 2 res1 = a2[i] - a1[i] [L58] 0 \read(t1) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L26] COND TRUE 1 !isNull2 && i < 5 [L27] EXPR 1 a1[i] VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L27] EXPR 1 a2[i] VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L27] 1 res1 = a1[i] - a2[i] VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L40] COND FALSE 2 !(res1 == 0) [L43] 2 i++ VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L38] COND TRUE 2 !isNull1 && i < 5 [L39] EXPR 2 a2[i] [L39] EXPR 2 a1[i] [L39] 2 res1 = a2[i] - a1[i] [L40] COND FALSE 2 !(res1 == 0) [L43] 2 i++ VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=-1, res2=0] [L38] COND TRUE 2 !isNull1 && i < 5 [L39] EXPR 2 a2[i] [L39] EXPR 2 a1[i] [L39] 2 res1 = a2[i] - a1[i] [L40] COND FALSE 2 !(res1 == 0) [L43] 2 i++ VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L28] COND FALSE 1 !(res1 == 0) [L31] 1 i++ VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L26] COND TRUE 1 !isNull2 && i < 5 [L27] EXPR 1 a1[i] VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L27] EXPR 1 a2[i] VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L27] 1 res1 = a1[i] - a2[i] VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=0, res2=0] [L28] COND TRUE 1 res1 == 0 [L38] COND TRUE 2 !isNull1 && i < 5 [L39] EXPR 2 a2[i] [L39] EXPR 2 a1[i] [L39] 2 res1 = a2[i] - a1[i] [L40] COND FALSE 2 !(res1 == 0) [L43] 2 i++ VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L38] COND FALSE 2 !(!isNull1 && i < 5) [L58] FCALL, JOIN 1 pthread_join(t1, 0) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L59] 0 \read(t2) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L59] FCALL, JOIN 2 pthread_join(t2, 0) VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] [L14] COND FALSE 0 !(!cond) [L14] COND FALSE 0 !(!cond) [L14] COND FALSE 0 !(!cond) [L64] 0 reach_error() VAL [a1={2:0}, a2={3:0}, isNull1=0, isNull2=0, res1=1, res2=0] - UnprovableResult [Line: 56]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 57]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 179 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 85694.8ms, OverallIterations: 59, TraceHistogramMax: 5, EmptinessCheckTime: 156.8ms, AutomataDifference: 29885.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4510.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2195 SDtfs, 7009 SDslu, 7396 SDs, 0 SdLazy, 17638 SolverSat, 983 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12260.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2505 GetRequests, 1315 SyntacticMatches, 36 SemanticMatches, 1154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4695 ImplicationChecksByTransitivity, 20916.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=858occurred in iteration=58, InterpolantAutomatonStates: 686, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1188.3ms AutomataMinimizationTime, 58 MinimizatonAttempts, 13015 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 669.7ms SsaConstructionTime, 4282.1ms SatisfiabilityAnalysisTime, 22393.1ms InterpolantComputationTime, 3476 NumberOfCodeBlocks, 3428 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3333 ConstructedInterpolants, 71 QuantifiedInterpolants, 30221 SizeOfPredicates, 372 NumberOfNonLiveVariables, 9830 ConjunctsInSsa, 788 ConjunctsInUnsatCore, 101 InterpolantComputations, 21 PerfectInterpolantSequences, 3859/4369 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-03 11:56:53,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...