./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test/easy6.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/test/easy6.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 ac73ca2be8965941731fbb6997aed9b9d8887745 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 20:44:00,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 20:44:00,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 20:44:00,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 20:44:00,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 20:44:00,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 20:44:00,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 20:44:00,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 20:44:00,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 20:44:00,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 20:44:01,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 20:44:01,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 20:44:01,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 20:44:01,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 20:44:01,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 20:44:01,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 20:44:01,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 20:44:01,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 20:44:01,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 20:44:01,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 20:44:01,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 20:44:01,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 20:44:01,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 20:44:01,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 20:44:01,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 20:44:01,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 20:44:01,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 20:44:01,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 20:44:01,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 20:44:01,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 20:44:01,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 20:44:01,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 20:44:01,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 20:44:01,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 20:44:01,055 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 20:44:01,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 20:44:01,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 20:44:01,057 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 20:44:01,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 20:44:01,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 20:44:01,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 20:44:01,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 20:44:01,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 20:44:01,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 20:44:01,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 20:44:01,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 20:44:01,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 20:44:01,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 20:44:01,130 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 20:44:01,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 20:44:01,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 20:44:01,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 20:44:01,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 20:44:01,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 20:44:01,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 20:44:01,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 20:44:01,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 20:44:01,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 20:44:01,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 20:44:01,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 20:44:01,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 20:44:01,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 20:44:01,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 20:44:01,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 20:44:01,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 20:44:01,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 20:44:01,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 20:44:01,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 20:44:01,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 20:44:01,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 20:44:01,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 20:44:01,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 20:44:01,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac73ca2be8965941731fbb6997aed9b9d8887745 [2021-10-05 20:44:01,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 20:44:01,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 20:44:01,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 20:44:01,588 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 20:44:01,589 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 20:44:01,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test/easy6.wvr.c [2021-10-05 20:44:01,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958c949a6/169d4a86905f4e4fbd327e4ef7aae064/FLAGaf21d400a [2021-10-05 20:44:02,305 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 20:44:02,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy6.wvr.c [2021-10-05 20:44:02,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958c949a6/169d4a86905f4e4fbd327e4ef7aae064/FLAGaf21d400a [2021-10-05 20:44:02,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/958c949a6/169d4a86905f4e4fbd327e4ef7aae064 [2021-10-05 20:44:02,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 20:44:02,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 20:44:02,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 20:44:02,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 20:44:02,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 20:44:02,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:02,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2779374a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02, skipping insertion in model container [2021-10-05 20:44:02,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:02,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 20:44:02,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 20:44:02,875 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/test/easy6.wvr.c[1988,2001] [2021-10-05 20:44:02,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 20:44:02,892 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 20:44:02,917 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/test/easy6.wvr.c[1988,2001] [2021-10-05 20:44:02,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 20:44:02,935 INFO L208 MainTranslator]: Completed translation [2021-10-05 20:44:02,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02 WrapperNode [2021-10-05 20:44:02,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 20:44:02,938 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 20:44:02,938 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 20:44:02,938 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 20:44:02,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:02,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:02,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 20:44:02,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 20:44:02,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 20:44:02,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 20:44:03,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 20:44:03,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 20:44:03,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 20:44:03,022 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 20:44:03,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (1/1) ... [2021-10-05 20:44:03,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 20:44:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:44:03,070 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) [2021-10-05 20:44:03,096 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 [2021-10-05 20:44:03,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 20:44:03,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 20:44:03,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 20:44:03,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 20:44:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 20:44:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 20:44:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 20:44:03,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 20:44:03,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 20:44:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 20:44:03,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 20:44:03,164 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 20:44:03,563 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 20:44:03,564 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-05 20:44:03,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:44:03 BoogieIcfgContainer [2021-10-05 20:44:03,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 20:44:03,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 20:44:03,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 20:44:03,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 20:44:03,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 08:44:02" (1/3) ... [2021-10-05 20:44:03,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65557f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 08:44:03, skipping insertion in model container [2021-10-05 20:44:03,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:44:02" (2/3) ... [2021-10-05 20:44:03,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65557f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 08:44:03, skipping insertion in model container [2021-10-05 20:44:03,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:44:03" (3/3) ... [2021-10-05 20:44:03,591 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.c [2021-10-05 20:44:03,600 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 20:44:03,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 20:44:03,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 20:44:03,601 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 20:44:03,685 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,685 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,686 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,686 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,690 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,690 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,690 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,691 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,691 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,691 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,691 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,694 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,695 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,695 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,695 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,695 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,696 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,696 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,696 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,700 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,701 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,701 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,701 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,702 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,703 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,703 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,705 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,705 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,706 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,706 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,706 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,707 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,708 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,708 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,709 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,710 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,710 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,711 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,712 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,712 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,712 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,714 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,715 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,715 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,715 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,716 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,716 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,723 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,724 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,724 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,724 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,732 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,732 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,733 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,733 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:44:03,757 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 20:44:03,841 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 20:44:03,856 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 [2021-10-05 20:44:03,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 20:44:03,900 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 20:44:03,925 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 92 transitions, 200 flow [2021-10-05 20:44:03,930 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 92 transitions, 200 flow [2021-10-05 20:44:03,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 92 transitions, 200 flow [2021-10-05 20:44:04,034 INFO L129 PetriNetUnfolder]: 5/90 cut-off events. [2021-10-05 20:44:04,035 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 20:44:04,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 5/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2021-10-05 20:44:04,047 INFO L116 LiptonReduction]: Number of co-enabled transitions 1400 [2021-10-05 20:44:07,302 INFO L131 LiptonReduction]: Checked pairs total: 6121 [2021-10-05 20:44:07,302 INFO L133 LiptonReduction]: Total number of compositions: 90 [2021-10-05 20:44:07,311 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 30 transitions, 76 flow [2021-10-05 20:44:07,336 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 200 states, 199 states have (on average 2.391959798994975) internal successors, (476), 199 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 199 states have (on average 2.391959798994975) internal successors, (476), 199 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 20:44:07,350 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:07,351 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:07,352 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1078898096, now seen corresponding path program 1 times [2021-10-05 20:44:07,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:07,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613384844] [2021-10-05 20:44:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:07,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:07,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:07,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613384844] [2021-10-05 20:44:07,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613384844] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:07,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:07,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 20:44:07,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877712974] [2021-10-05 20:44:07,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-05 20:44:07,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:07,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-05 20:44:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-05 20:44:07,572 INFO L87 Difference]: Start difference. First operand has 200 states, 199 states have (on average 2.391959798994975) internal successors, (476), 199 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:07,598 INFO L93 Difference]: Finished difference Result 200 states and 436 transitions. [2021-10-05 20:44:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-05 20:44:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-05 20:44:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:07,614 INFO L225 Difference]: With dead ends: 200 [2021-10-05 20:44:07,614 INFO L226 Difference]: Without dead ends: 200 [2021-10-05 20:44:07,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-05 20:44:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-05 20:44:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-10-05 20:44:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-10-05 20:44:07,685 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 11 [2021-10-05 20:44:07,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:07,686 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-10-05 20:44:07,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-10-05 20:44:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:07,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:07,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:07,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 20:44:07,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:07,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2017297194, now seen corresponding path program 1 times [2021-10-05 20:44:07,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:07,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667124489] [2021-10-05 20:44:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:07,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:07,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:07,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667124489] [2021-10-05 20:44:07,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667124489] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:07,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:07,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-05 20:44:07,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807357856] [2021-10-05 20:44:07,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:44:07,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:07,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:44:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:44:07,924 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:08,080 INFO L93 Difference]: Finished difference Result 364 states and 789 transitions. [2021-10-05 20:44:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 20:44:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:08,086 INFO L225 Difference]: With dead ends: 364 [2021-10-05 20:44:08,087 INFO L226 Difference]: Without dead ends: 350 [2021-10-05 20:44:08,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-05 20:44:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-10-05 20:44:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 236. [2021-10-05 20:44:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.1872340425531913) internal successors, (514), 235 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 514 transitions. [2021-10-05 20:44:08,114 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 514 transitions. Word has length 25 [2021-10-05 20:44:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:08,115 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 514 transitions. [2021-10-05 20:44:08,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 514 transitions. [2021-10-05 20:44:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:08,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:08,119 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:08,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 20:44:08,119 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:08,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:08,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1194029782, now seen corresponding path program 2 times [2021-10-05 20:44:08,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:08,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144386217] [2021-10-05 20:44:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:08,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:08,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:08,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144386217] [2021-10-05 20:44:08,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144386217] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:08,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:08,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 20:44:08,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817770318] [2021-10-05 20:44:08,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 20:44:08,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 20:44:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 20:44:08,285 INFO L87 Difference]: Start difference. First operand 236 states and 514 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-10-05 20:44:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:08,354 INFO L93 Difference]: Finished difference Result 287 states and 593 transitions. [2021-10-05 20:44:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:44:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:08,357 INFO L225 Difference]: With dead ends: 287 [2021-10-05 20:44:08,357 INFO L226 Difference]: Without dead ends: 204 [2021-10-05 20:44:08,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-05 20:44:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-10-05 20:44:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 170. [2021-10-05 20:44:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.136094674556213) internal successors, (361), 169 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 361 transitions. [2021-10-05 20:44:08,369 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 361 transitions. Word has length 25 [2021-10-05 20:44:08,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:08,370 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 361 transitions. [2021-10-05 20:44:08,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-10-05 20:44:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 361 transitions. [2021-10-05 20:44:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:08,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:08,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:08,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 20:44:08,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash -682414364, now seen corresponding path program 3 times [2021-10-05 20:44:08,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:08,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593781960] [2021-10-05 20:44:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:08,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:08,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:08,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593781960] [2021-10-05 20:44:08,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593781960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:08,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:08,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 20:44:08,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956628662] [2021-10-05 20:44:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 20:44:08,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 20:44:08,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 20:44:08,435 INFO L87 Difference]: Start difference. First operand 170 states and 361 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:08,445 INFO L93 Difference]: Finished difference Result 164 states and 346 transitions. [2021-10-05 20:44:08,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 20:44:08,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:08,447 INFO L225 Difference]: With dead ends: 164 [2021-10-05 20:44:08,447 INFO L226 Difference]: Without dead ends: 164 [2021-10-05 20:44:08,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 20:44:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-05 20:44:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-10-05 20:44:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1226993865030677) internal successors, (346), 163 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:08,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 346 transitions. [2021-10-05 20:44:08,457 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 346 transitions. Word has length 25 [2021-10-05 20:44:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:08,457 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 346 transitions. [2021-10-05 20:44:08,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 346 transitions. [2021-10-05 20:44:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:08,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:08,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:08,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 20:44:08,460 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:08,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:08,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1983711056, now seen corresponding path program 4 times [2021-10-05 20:44:08,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:08,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448367035] [2021-10-05 20:44:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:08,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:08,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:08,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448367035] [2021-10-05 20:44:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448367035] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:08,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:08,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-05 20:44:08,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277807573] [2021-10-05 20:44:08,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:44:08,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:08,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:44:08,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:44:08,619 INFO L87 Difference]: Start difference. First operand 164 states and 346 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:08,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:08,736 INFO L93 Difference]: Finished difference Result 312 states and 655 transitions. [2021-10-05 20:44:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:44:08,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:08,739 INFO L225 Difference]: With dead ends: 312 [2021-10-05 20:44:08,740 INFO L226 Difference]: Without dead ends: 312 [2021-10-05 20:44:08,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-05 20:44:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-05 20:44:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 204. [2021-10-05 20:44:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.147783251231527) internal successors, (436), 203 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 436 transitions. [2021-10-05 20:44:08,753 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 436 transitions. Word has length 25 [2021-10-05 20:44:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:08,754 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 436 transitions. [2021-10-05 20:44:08,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 436 transitions. [2021-10-05 20:44:08,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:08,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:08,757 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:08,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 20:44:08,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:08,759 INFO L82 PathProgramCache]: Analyzing trace with hash 798648552, now seen corresponding path program 5 times [2021-10-05 20:44:08,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:08,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832014] [2021-10-05 20:44:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:08,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:08,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:08,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832014] [2021-10-05 20:44:08,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:08,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:08,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-05 20:44:08,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939381448] [2021-10-05 20:44:08,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 20:44:08,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 20:44:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:44:08,970 INFO L87 Difference]: Start difference. First operand 204 states and 436 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) 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) [2021-10-05 20:44:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:09,107 INFO L93 Difference]: Finished difference Result 316 states and 658 transitions. [2021-10-05 20:44:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 20:44:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) 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 25 [2021-10-05 20:44:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:09,110 INFO L225 Difference]: With dead ends: 316 [2021-10-05 20:44:09,110 INFO L226 Difference]: Without dead ends: 302 [2021-10-05 20:44:09,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-10-05 20:44:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-05 20:44:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 194. [2021-10-05 20:44:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1295336787564767) internal successors, (411), 193 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 411 transitions. [2021-10-05 20:44:09,121 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 411 transitions. Word has length 25 [2021-10-05 20:44:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:09,121 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 411 transitions. [2021-10-05 20:44:09,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) 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) [2021-10-05 20:44:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 411 transitions. [2021-10-05 20:44:09,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:09,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:09,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-05 20:44:09,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:09,125 INFO L82 PathProgramCache]: Analyzing trace with hash -561645392, now seen corresponding path program 6 times [2021-10-05 20:44:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:09,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431532899] [2021-10-05 20:44:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:09,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:09,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:09,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431532899] [2021-10-05 20:44:09,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431532899] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:09,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:09,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 20:44:09,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169751399] [2021-10-05 20:44:09,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 20:44:09,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 20:44:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-05 20:44:09,220 INFO L87 Difference]: Start difference. First operand 194 states and 411 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-10-05 20:44:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:09,289 INFO L93 Difference]: Finished difference Result 227 states and 462 transitions. [2021-10-05 20:44:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:44:09,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:09,291 INFO L225 Difference]: With dead ends: 227 [2021-10-05 20:44:09,291 INFO L226 Difference]: Without dead ends: 128 [2021-10-05 20:44:09,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-05 20:44:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-05 20:44:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-10-05 20:44:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0353982300884956) internal successors, (230), 113 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 230 transitions. [2021-10-05 20:44:09,297 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 230 transitions. Word has length 25 [2021-10-05 20:44:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:09,298 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 230 transitions. [2021-10-05 20:44:09,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 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) [2021-10-05 20:44:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 230 transitions. [2021-10-05 20:44:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:09,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:09,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:09,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-05 20:44:09,301 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:09,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1425239598, now seen corresponding path program 7 times [2021-10-05 20:44:09,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:09,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440873977] [2021-10-05 20:44:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:09,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:09,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:09,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440873977] [2021-10-05 20:44:09,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440873977] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:09,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:09,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-05 20:44:09,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187879408] [2021-10-05 20:44:09,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:44:09,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:44:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:44:09,421 INFO L87 Difference]: Start difference. First operand 114 states and 230 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:09,528 INFO L93 Difference]: Finished difference Result 154 states and 312 transitions. [2021-10-05 20:44:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 20:44:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:09,530 INFO L225 Difference]: With dead ends: 154 [2021-10-05 20:44:09,530 INFO L226 Difference]: Without dead ends: 110 [2021-10-05 20:44:09,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-05 20:44:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-05 20:44:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-10-05 20:44:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.018348623853211) internal successors, (220), 109 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 220 transitions. [2021-10-05 20:44:09,535 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 220 transitions. Word has length 25 [2021-10-05 20:44:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:09,536 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 220 transitions. [2021-10-05 20:44:09,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 220 transitions. [2021-10-05 20:44:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 20:44:09,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:44:09,537 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:44:09,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-05 20:44:09,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:44:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:44:09,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1537351332, now seen corresponding path program 8 times [2021-10-05 20:44:09,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:44:09,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644369263] [2021-10-05 20:44:09,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:44:09,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:44:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:44:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:44:09,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:44:09,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644369263] [2021-10-05 20:44:09,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644369263] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:44:09,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:44:09,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-05 20:44:09,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631464827] [2021-10-05 20:44:09,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:44:09,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:44:09,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:44:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:44:09,630 INFO L87 Difference]: Start difference. First operand 110 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:44:09,718 INFO L93 Difference]: Finished difference Result 78 states and 158 transitions. [2021-10-05 20:44:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:44:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 20:44:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:44:09,719 INFO L225 Difference]: With dead ends: 78 [2021-10-05 20:44:09,719 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 20:44:09,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-05 20:44:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 20:44:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 20:44:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:44:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 20:44:09,720 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-10-05 20:44:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:44:09,720 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 20:44:09,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-10-05 20:44:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 20:44:09,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 20:44:09,724 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 20:44:09,725 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 20:44:09,725 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 20:44:09,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-05 20:44:09,730 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 20:44:09,730 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 20:44:09,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 08:44:09 BasicIcfg [2021-10-05 20:44:09,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 20:44:09,733 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 20:44:09,733 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 20:44:09,734 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 20:44:09,734 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:44:03" (3/4) ... [2021-10-05 20:44:09,737 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 20:44:09,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 20:44:09,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 20:44:09,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-05 20:44:09,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 20:44:09,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 20:44:09,751 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 20:44:09,789 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 20:44:09,789 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 20:44:09,791 INFO L168 Benchmark]: Toolchain (without parser) took 7148.75 ms. Allocated memory was 46.1 MB in the beginning and 83.9 MB in the end (delta: 37.7 MB). Free memory was 21.9 MB in the beginning and 40.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,792 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 23.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 20:44:09,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.66 ms. Allocated memory is still 56.6 MB. Free memory was 41.2 MB in the beginning and 31.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.54 ms. Allocated memory is still 56.6 MB. Free memory was 31.1 MB in the beginning and 29.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,797 INFO L168 Benchmark]: Boogie Preprocessor took 29.94 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 28.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,797 INFO L168 Benchmark]: RCFGBuilder took 549.64 ms. Allocated memory is still 56.6 MB. Free memory was 28.3 MB in the beginning and 32.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,802 INFO L168 Benchmark]: TraceAbstraction took 6158.90 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 31.7 MB in the beginning and 43.2 MB in the end (delta: -11.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,803 INFO L168 Benchmark]: Witness Printer took 55.93 ms. Allocated memory is still 83.9 MB. Free memory was 43.2 MB in the beginning and 40.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:44:09,805 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 46.1 MB. Free memory was 23.1 MB in the beginning and 23.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 281.66 ms. Allocated memory is still 56.6 MB. Free memory was 41.2 MB in the beginning and 31.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.54 ms. Allocated memory is still 56.6 MB. Free memory was 31.1 MB in the beginning and 29.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.94 ms. Allocated memory is still 56.6 MB. Free memory was 29.5 MB in the beginning and 28.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 549.64 ms. Allocated memory is still 56.6 MB. Free memory was 28.3 MB in the beginning and 32.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6158.90 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 31.7 MB in the beginning and 43.2 MB in the end (delta: -11.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * Witness Printer took 55.93 ms. Allocated memory is still 83.9 MB. Free memory was 43.2 MB in the beginning and 40.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3373.0ms, 94 PlacesBefore, 35 PlacesAfterwards, 92 TransitionsBefore, 30 TransitionsAfterwards, 1400 CoEnabledTransitionPairs, 11 FixpointIterations, 36 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 3 ChoiceCompositions, 90 TotalNumberOfCompositions, 6121 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3527, positive: 3206, positive conditional: 0, positive unconditional: 3206, negative: 321, negative conditional: 0, negative unconditional: 321, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1205, positive: 1149, positive conditional: 0, positive unconditional: 1149, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1205, positive: 1108, positive conditional: 0, positive unconditional: 1108, negative: 97, negative conditional: 0, negative unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 97, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 56, negative conditional: 0, negative unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 127, positive: 30, positive conditional: 0, positive unconditional: 30, negative: 96, negative conditional: 0, negative unconditional: 96, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3527, positive: 2057, positive conditional: 0, positive unconditional: 2057, negative: 265, negative conditional: 0, negative unconditional: 265, unknown: 1205, unknown conditional: 0, unknown unconditional: 1205] , Statistics on independence cache: Total cache size (in pairs): 208, Positive cache size: 186, Positive conditional cache size: 0, Positive unconditional cache size: 186, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 128 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 5891.9ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 29.1ms, AutomataDifference: 856.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3479.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 307 SDtfs, 536 SDslu, 802 SDs, 0 SdLazy, 340 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 255.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 565.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=2, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 131.2ms AutomataMinimizationTime, 9 MinimizatonAttempts, 378 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.1ms SsaConstructionTime, 297.4ms SatisfiabilityAnalysisTime, 825.1ms InterpolantComputationTime, 211 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 202 ConstructedInterpolants, 0 QuantifiedInterpolants, 949 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 20:44:09,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...