./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/simple-array-sum.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/popl20/simple-array-sum.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 407f95dd717ecc0cd05484e023f3a40d2bffaefb .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-04 19:03:59,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 19:03:59,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 19:03:59,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 19:03:59,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 19:03:59,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 19:03:59,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 19:03:59,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 19:03:59,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 19:03:59,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 19:03:59,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 19:03:59,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 19:03:59,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 19:03:59,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 19:03:59,313 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 19:03:59,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 19:03:59,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 19:03:59,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 19:03:59,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 19:03:59,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 19:03:59,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 19:03:59,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 19:03:59,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 19:03:59,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 19:03:59,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 19:03:59,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 19:03:59,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 19:03:59,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 19:03:59,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 19:03:59,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 19:03:59,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 19:03:59,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 19:03:59,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 19:03:59,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 19:03:59,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 19:03:59,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 19:03:59,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 19:03:59,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 19:03:59,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 19:03:59,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 19:03:59,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 19:03:59,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 19:03:59,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 19:03:59,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 19:03:59,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 19:03:59,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 19:03:59,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 19:03:59,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 19:03:59,404 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 19:03:59,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 19:03:59,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 19:03:59,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 19:03:59,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 19:03:59,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 19:03:59,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 19:03:59,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 19:03:59,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 19:03:59,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 19:03:59,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 19:03:59,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 19:03:59,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 19:03:59,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 19:03:59,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 19:03:59,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 19:03:59,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:03:59,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 19:03:59,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 19:03:59,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 19:03:59,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 19:03:59,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 19:03:59,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 19:03:59,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 19:03:59,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 407f95dd717ecc0cd05484e023f3a40d2bffaefb [2021-10-04 19:03:59,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 19:03:59,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 19:03:59,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 19:03:59,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 19:03:59,830 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 19:03:59,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c [2021-10-04 19:03:59,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e62a0c0e/8045a84fddbf4464b660e7be010a5c9a/FLAGf34919c22 [2021-10-04 19:04:00,447 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 19:04:00,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/simple-array-sum.wvr.c [2021-10-04 19:04:00,449 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:04:00,449 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:04:00,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e62a0c0e/8045a84fddbf4464b660e7be010a5c9a/FLAGf34919c22 [2021-10-04 19:04:00,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e62a0c0e/8045a84fddbf4464b660e7be010a5c9a [2021-10-04 19:04:00,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 19:04:00,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 19:04:00,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 19:04:00,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 19:04:00,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 19:04:00,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:04:00" (1/1) ... [2021-10-04 19:04:00,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66256529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:00, skipping insertion in model container [2021-10-04 19:04:00,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:04:00" (1/1) ... [2021-10-04 19:04:00,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 19:04:00,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 19:04:01,008 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:04:01,057 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/popl20/simple-array-sum.wvr.c[1134,1147] [2021-10-04 19:04:01,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:04:01,076 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 19:04:01,090 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:04:01,103 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/popl20/simple-array-sum.wvr.c[1134,1147] [2021-10-04 19:04:01,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:04:01,125 INFO L208 MainTranslator]: Completed translation [2021-10-04 19:04:01,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01 WrapperNode [2021-10-04 19:04:01,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 19:04:01,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 19:04:01,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 19:04:01,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 19:04:01,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 19:04:01,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 19:04:01,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 19:04:01,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 19:04:01,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 19:04:01,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 19:04:01,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 19:04:01,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 19:04:01,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (1/1) ... [2021-10-04 19:04:01,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:04:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:01,271 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) [2021-10-04 19:04:01,293 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 [2021-10-04 19:04:01,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 19:04:01,350 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 19:04:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 19:04:01,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 19:04:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-04 19:04:01,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-04 19:04:01,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 19:04:01,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 19:04:01,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-04 19:04:01,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 19:04:01,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 19:04:01,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 19:04:01,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 19:04:01,355 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 19:04:01,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 19:04:01,820 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-04 19:04:01,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:04:01 BoogieIcfgContainer [2021-10-04 19:04:01,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 19:04:01,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 19:04:01,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 19:04:01,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 19:04:01,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 07:04:00" (1/3) ... [2021-10-04 19:04:01,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d729b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:04:01, skipping insertion in model container [2021-10-04 19:04:01,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:04:01" (2/3) ... [2021-10-04 19:04:01,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d729b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:04:01, skipping insertion in model container [2021-10-04 19:04:01,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:04:01" (3/3) ... [2021-10-04 19:04:01,838 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.c [2021-10-04 19:04:01,845 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 19:04:01,845 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 19:04:01,845 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 19:04:01,846 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 19:04:01,924 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,925 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,925 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,926 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,927 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,927 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,927 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,928 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,928 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,928 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,929 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,929 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,929 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,930 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,932 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,932 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,933 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,933 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,934 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,934 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,934 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,935 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,936 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,936 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,938 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,938 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,939 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,940 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,940 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,941 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,941 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,941 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,942 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,942 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,943 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,943 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,943 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,944 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,944 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,945 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,945 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,946 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,946 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,946 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,947 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,947 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,948 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,948 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,949 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,949 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,951 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,952 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,952 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,953 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,953 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,953 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,953 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,954 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,954 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,955 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,955 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,955 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,956 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,957 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,957 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,958 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,959 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,959 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,959 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,960 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,960 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,960 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,961 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,961 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,961 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,962 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,962 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,962 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,963 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,967 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,967 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_~i~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,968 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,969 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,978 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,981 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,982 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,983 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,983 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,994 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,995 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,995 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,995 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:01,996 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:04:02,018 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-04 19:04:02,093 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 19:04:02,101 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 [2021-10-04 19:04:02,101 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-04 19:04:02,126 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 19:04:02,139 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 151 transitions, 326 flow [2021-10-04 19:04:02,142 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 151 transitions, 326 flow [2021-10-04 19:04:02,144 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 147 places, 151 transitions, 326 flow [2021-10-04 19:04:02,247 INFO L129 PetriNetUnfolder]: 14/148 cut-off events. [2021-10-04 19:04:02,248 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-04 19:04:02,254 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 148 events. 14/148 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 121 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 112. Up to 3 conditions per place. [2021-10-04 19:04:02,261 INFO L116 LiptonReduction]: Number of co-enabled transitions 1714 [2021-10-04 19:04:06,700 INFO L131 LiptonReduction]: Checked pairs total: 2513 [2021-10-04 19:04:06,701 INFO L133 LiptonReduction]: Total number of compositions: 132 [2021-10-04 19:04:06,712 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 34 transitions, 92 flow [2021-10-04 19:04:06,741 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:04:06,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:06,760 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] [2021-10-04 19:04:06,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash -134499675, now seen corresponding path program 1 times [2021-10-04 19:04:06,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:06,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081284014] [2021-10-04 19:04:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:06,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:04:07,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:07,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081284014] [2021-10-04 19:04:07,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081284014] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:04:07,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:04:07,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-04 19:04:07,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494782861] [2021-10-04 19:04:07,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:04:07,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:04:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:04:07,380 INFO L87 Difference]: Start difference. First operand has 210 states, 209 states have (on average 3.38755980861244) internal successors, (708), 209 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:07,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:07,469 INFO L93 Difference]: Finished difference Result 418 states and 1414 transitions. [2021-10-04 19:04:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:04:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:04:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:07,501 INFO L225 Difference]: With dead ends: 418 [2021-10-04 19:04:07,502 INFO L226 Difference]: Without dead ends: 395 [2021-10-04 19:04:07,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:04:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-10-04 19:04:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 353. [2021-10-04 19:04:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.4232954545454546) internal successors, (1205), 352 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1205 transitions. [2021-10-04 19:04:07,616 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1205 transitions. Word has length 21 [2021-10-04 19:04:07,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:07,618 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1205 transitions. [2021-10-04 19:04:07,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1205 transitions. [2021-10-04 19:04:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-04 19:04:07,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:07,631 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] [2021-10-04 19:04:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 19:04:07,632 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash 550906475, now seen corresponding path program 1 times [2021-10-04 19:04:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:07,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510455246] [2021-10-04 19:04:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:07,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:04:07,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:07,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510455246] [2021-10-04 19:04:07,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510455246] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:04:07,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:04:07,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-04 19:04:07,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335221483] [2021-10-04 19:04:07,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 19:04:07,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 19:04:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:04:07,733 INFO L87 Difference]: Start difference. First operand 353 states and 1205 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:07,827 INFO L93 Difference]: Finished difference Result 831 states and 2700 transitions. [2021-10-04 19:04:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 19:04:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-04 19:04:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:07,838 INFO L225 Difference]: With dead ends: 831 [2021-10-04 19:04:07,838 INFO L226 Difference]: Without dead ends: 791 [2021-10-04 19:04:07,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-04 19:04:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2021-10-04 19:04:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 439. [2021-10-04 19:04:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.365296803652968) internal successors, (1474), 438 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1474 transitions. [2021-10-04 19:04:07,902 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1474 transitions. Word has length 22 [2021-10-04 19:04:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:07,903 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1474 transitions. [2021-10-04 19:04:07,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1474 transitions. [2021-10-04 19:04:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-04 19:04:07,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:07,907 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] [2021-10-04 19:04:07,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-04 19:04:07,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2094545201, now seen corresponding path program 1 times [2021-10-04 19:04:07,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:07,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924324538] [2021-10-04 19:04:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:07,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:04:07,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:07,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924324538] [2021-10-04 19:04:07,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924324538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:07,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804832618] [2021-10-04 19:04:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:07,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:07,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:07,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:07,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-04 19:04:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:08,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:04:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:04:08,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804832618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:08,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:08,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-04 19:04:08,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724833818] [2021-10-04 19:04:08,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 19:04:08,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 19:04:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-04 19:04:08,199 INFO L87 Difference]: Start difference. First operand 439 states and 1474 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:08,296 INFO L93 Difference]: Finished difference Result 644 states and 2158 transitions. [2021-10-04 19:04:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:04:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-04 19:04:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:08,304 INFO L225 Difference]: With dead ends: 644 [2021-10-04 19:04:08,304 INFO L226 Difference]: Without dead ends: 644 [2021-10-04 19:04:08,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-04 19:04:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-10-04 19:04:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 394. [2021-10-04 19:04:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.3944020356234095) internal successors, (1334), 393 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1334 transitions. [2021-10-04 19:04:08,353 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1334 transitions. Word has length 22 [2021-10-04 19:04:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:08,354 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1334 transitions. [2021-10-04 19:04:08,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1334 transitions. [2021-10-04 19:04:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:04:08,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:08,358 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] [2021-10-04 19:04:08,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:08,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:08,572 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1386832260, now seen corresponding path program 1 times [2021-10-04 19:04:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:08,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090720937] [2021-10-04 19:04:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:08,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:04:08,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:08,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090720937] [2021-10-04 19:04:08,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090720937] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:04:08,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:04:08,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:04:08,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553590577] [2021-10-04 19:04:08,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:04:08,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:08,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:04:08,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:04:08,696 INFO L87 Difference]: Start difference. First operand 394 states and 1334 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:08,732 INFO L93 Difference]: Finished difference Result 594 states and 1927 transitions. [2021-10-04 19:04:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:04:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:04:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:08,739 INFO L225 Difference]: With dead ends: 594 [2021-10-04 19:04:08,739 INFO L226 Difference]: Without dead ends: 568 [2021-10-04 19:04:08,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:04:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-10-04 19:04:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 532. [2021-10-04 19:04:08,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.3389830508474576) internal successors, (1773), 531 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1773 transitions. [2021-10-04 19:04:08,772 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1773 transitions. Word has length 23 [2021-10-04 19:04:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:08,772 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1773 transitions. [2021-10-04 19:04:08,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:08,773 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1773 transitions. [2021-10-04 19:04:08,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:04:08,776 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:08,776 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] [2021-10-04 19:04:08,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-04 19:04:08,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 607121442, now seen corresponding path program 1 times [2021-10-04 19:04:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:08,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877426778] [2021-10-04 19:04:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:08,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:04:08,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:08,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877426778] [2021-10-04 19:04:08,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877426778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:08,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061002092] [2021-10-04 19:04:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:08,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:08,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:08,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-04 19:04:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:04:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:04:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061002092] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:09,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:09,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-04 19:04:09,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845448445] [2021-10-04 19:04:09,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 19:04:09,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:09,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 19:04:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-04 19:04:09,126 INFO L87 Difference]: Start difference. First operand 532 states and 1773 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:09,269 INFO L93 Difference]: Finished difference Result 822 states and 2671 transitions. [2021-10-04 19:04:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:04:09,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:04:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:09,278 INFO L225 Difference]: With dead ends: 822 [2021-10-04 19:04:09,278 INFO L226 Difference]: Without dead ends: 822 [2021-10-04 19:04:09,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:04:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-10-04 19:04:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 514. [2021-10-04 19:04:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.317738791423002) internal successors, (1702), 513 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:09,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1702 transitions. [2021-10-04 19:04:09,306 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1702 transitions. Word has length 23 [2021-10-04 19:04:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:09,307 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1702 transitions. [2021-10-04 19:04:09,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1702 transitions. [2021-10-04 19:04:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:04:09,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:09,310 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, 1] [2021-10-04 19:04:09,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:09,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:09,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:09,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1459051159, now seen corresponding path program 1 times [2021-10-04 19:04:09,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:09,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540125545] [2021-10-04 19:04:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:09,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:04:09,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540125545] [2021-10-04 19:04:09,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540125545] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288706331] [2021-10-04 19:04:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:09,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:09,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:09,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:09,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-04 19:04:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:04:09,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:04:09,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288706331] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:04:09,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-04 19:04:09,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-04 19:04:09,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071731229] [2021-10-04 19:04:09,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 19:04:09,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 19:04:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:04:09,785 INFO L87 Difference]: Start difference. First operand 514 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:09,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:09,854 INFO L93 Difference]: Finished difference Result 382 states and 1181 transitions. [2021-10-04 19:04:09,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 19:04:09,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-04 19:04:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:09,858 INFO L225 Difference]: With dead ends: 382 [2021-10-04 19:04:09,858 INFO L226 Difference]: Without dead ends: 278 [2021-10-04 19:04:09,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:04:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-10-04 19:04:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-10-04 19:04:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.371841155234657) internal successors, (934), 277 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:09,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 934 transitions. [2021-10-04 19:04:09,871 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 934 transitions. Word has length 26 [2021-10-04 19:04:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:09,871 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 934 transitions. [2021-10-04 19:04:09,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 934 transitions. [2021-10-04 19:04:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:04:09,874 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:09,874 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, 1] [2021-10-04 19:04:09,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:10,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:10,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1605109301, now seen corresponding path program 1 times [2021-10-04 19:04:10,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:10,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428705018] [2021-10-04 19:04:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:10,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:04:10,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:10,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428705018] [2021-10-04 19:04:10,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428705018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:10,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140145692] [2021-10-04 19:04:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:10,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:10,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:10,189 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:10,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-04 19:04:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:04:10,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:04:10,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140145692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:10,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:10,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-04 19:04:10,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715161519] [2021-10-04 19:04:10,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 19:04:10,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 19:04:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-04 19:04:10,405 INFO L87 Difference]: Start difference. First operand 278 states and 934 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:10,500 INFO L93 Difference]: Finished difference Result 348 states and 1180 transitions. [2021-10-04 19:04:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:04:10,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-04 19:04:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:10,504 INFO L225 Difference]: With dead ends: 348 [2021-10-04 19:04:10,505 INFO L226 Difference]: Without dead ends: 348 [2021-10-04 19:04:10,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:04:10,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-10-04 19:04:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2021-10-04 19:04:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.400576368876081) internal successors, (1180), 347 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1180 transitions. [2021-10-04 19:04:10,524 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1180 transitions. Word has length 26 [2021-10-04 19:04:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:10,524 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1180 transitions. [2021-10-04 19:04:10,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1180 transitions. [2021-10-04 19:04:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-04 19:04:10,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:10,527 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, 1, 1] [2021-10-04 19:04:10,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-04 19:04:10,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:10,741 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:10,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash 436037149, now seen corresponding path program 1 times [2021-10-04 19:04:10,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:10,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082743864] [2021-10-04 19:04:10,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:10,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:04:10,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:10,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082743864] [2021-10-04 19:04:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082743864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:10,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918751407] [2021-10-04 19:04:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:10,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:10,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:10,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:10,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-04 19:04:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:10,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:04:10,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:04:10,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918751407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:10,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:10,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-04 19:04:10,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923217908] [2021-10-04 19:04:10,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 19:04:10,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 19:04:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-04 19:04:11,004 INFO L87 Difference]: Start difference. First operand 348 states and 1180 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:11,080 INFO L93 Difference]: Finished difference Result 412 states and 1414 transitions. [2021-10-04 19:04:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:04:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-04 19:04:11,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:11,089 INFO L225 Difference]: With dead ends: 412 [2021-10-04 19:04:11,089 INFO L226 Difference]: Without dead ends: 412 [2021-10-04 19:04:11,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:04:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-04 19:04:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 370. [2021-10-04 19:04:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.4525745257452574) internal successors, (1274), 369 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1274 transitions. [2021-10-04 19:04:11,107 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1274 transitions. Word has length 27 [2021-10-04 19:04:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:11,108 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1274 transitions. [2021-10-04 19:04:11,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1274 transitions. [2021-10-04 19:04:11,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-04 19:04:11,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:11,110 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, 1, 1, 1, 1] [2021-10-04 19:04:11,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:11,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:11,324 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1438209012, now seen corresponding path program 1 times [2021-10-04 19:04:11,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:11,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680251716] [2021-10-04 19:04:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:11,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:04:11,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:11,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680251716] [2021-10-04 19:04:11,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680251716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:11,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58839159] [2021-10-04 19:04:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:11,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:11,384 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:11,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-04 19:04:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-04 19:04:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:04:11,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58839159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:11,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:11,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-04 19:04:11,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954434975] [2021-10-04 19:04:11,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 19:04:11,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 19:04:11,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:04:11,598 INFO L87 Difference]: Start difference. First operand 370 states and 1274 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:11,662 INFO L93 Difference]: Finished difference Result 486 states and 1650 transitions. [2021-10-04 19:04:11,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:04:11,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-04 19:04:11,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:11,667 INFO L225 Difference]: With dead ends: 486 [2021-10-04 19:04:11,668 INFO L226 Difference]: Without dead ends: 454 [2021-10-04 19:04:11,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:04:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-10-04 19:04:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2021-10-04 19:04:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.4216335540838854) internal successors, (1550), 453 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1550 transitions. [2021-10-04 19:04:11,690 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1550 transitions. Word has length 29 [2021-10-04 19:04:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:11,690 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1550 transitions. [2021-10-04 19:04:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1550 transitions. [2021-10-04 19:04:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-04 19:04:11,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:11,694 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:11,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:11,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:11,904 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1098508591, now seen corresponding path program 2 times [2021-10-04 19:04:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:11,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40034698] [2021-10-04 19:04:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:11,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:04:11,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:11,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40034698] [2021-10-04 19:04:11,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40034698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:11,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051802834] [2021-10-04 19:04:11,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:04:11,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:11,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:11,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-04 19:04:12,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:04:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:04:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:04:12,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051802834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:12,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:12,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-04 19:04:12,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559828750] [2021-10-04 19:04:12,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-04 19:04:12,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-04 19:04:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-04 19:04:12,254 INFO L87 Difference]: Start difference. First operand 454 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:12,474 INFO L93 Difference]: Finished difference Result 757 states and 2457 transitions. [2021-10-04 19:04:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-04 19:04:12,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-04 19:04:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:12,479 INFO L225 Difference]: With dead ends: 757 [2021-10-04 19:04:12,480 INFO L226 Difference]: Without dead ends: 456 [2021-10-04 19:04:12,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-04 19:04:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-10-04 19:04:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2021-10-04 19:04:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.410989010989011) internal successors, (1552), 455 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1552 transitions. [2021-10-04 19:04:12,511 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1552 transitions. Word has length 32 [2021-10-04 19:04:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:12,511 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1552 transitions. [2021-10-04 19:04:12,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1552 transitions. [2021-10-04 19:04:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-04 19:04:12,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:12,515 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:12,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:12,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-04 19:04:12,730 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:12,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106894, now seen corresponding path program 3 times [2021-10-04 19:04:12,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:12,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316222126] [2021-10-04 19:04:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:12,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:04:12,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:12,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316222126] [2021-10-04 19:04:12,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316222126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:12,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895523754] [2021-10-04 19:04:12,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:04:12,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:12,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:12,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-04 19:04:12,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 19:04:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:04:12,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-04 19:04:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895523754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:13,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-04 19:04:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525143142] [2021-10-04 19:04:13,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-04 19:04:13,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-04 19:04:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-04 19:04:13,091 INFO L87 Difference]: Start difference. First operand 456 states and 1552 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:13,353 INFO L93 Difference]: Finished difference Result 698 states and 2430 transitions. [2021-10-04 19:04:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 19:04:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-04 19:04:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:13,360 INFO L225 Difference]: With dead ends: 698 [2021-10-04 19:04:13,360 INFO L226 Difference]: Without dead ends: 698 [2021-10-04 19:04:13,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:04:13,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-10-04 19:04:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 648. [2021-10-04 19:04:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.4961360123647602) internal successors, (2262), 647 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:13,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2262 transitions. [2021-10-04 19:04:13,389 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2262 transitions. Word has length 34 [2021-10-04 19:04:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:13,389 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2262 transitions. [2021-10-04 19:04:13,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2262 transitions. [2021-10-04 19:04:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-04 19:04:13,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:13,393 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:13,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:13,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-04 19:04:13,608 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2112452557, now seen corresponding path program 4 times [2021-10-04 19:04:13,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:13,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415672945] [2021-10-04 19:04:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:13,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-04 19:04:13,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:13,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415672945] [2021-10-04 19:04:13,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415672945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:13,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974439847] [2021-10-04 19:04:13,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:04:13,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:13,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:13,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:13,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-04 19:04:13,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:04:13,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:13,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-04 19:04:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-04 19:04:13,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974439847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:13,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:13,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-10-04 19:04:13,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999364005] [2021-10-04 19:04:13,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-04 19:04:13,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:13,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-04 19:04:13,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:04:13,901 INFO L87 Difference]: Start difference. First operand 648 states and 2262 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:14,094 INFO L93 Difference]: Finished difference Result 1224 states and 4233 transitions. [2021-10-04 19:04:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-04 19:04:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-04 19:04:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:14,106 INFO L225 Difference]: With dead ends: 1224 [2021-10-04 19:04:14,107 INFO L226 Difference]: Without dead ends: 1116 [2021-10-04 19:04:14,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-10-04 19:04:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-10-04 19:04:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 908. [2021-10-04 19:04:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.520396912899669) internal successors, (3193), 907 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 3193 transitions. [2021-10-04 19:04:14,164 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 3193 transitions. Word has length 37 [2021-10-04 19:04:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:14,165 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 3193 transitions. [2021-10-04 19:04:14,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 3193 transitions. [2021-10-04 19:04:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-04 19:04:14,170 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:14,170 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:14,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:14,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:14,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -259426688, now seen corresponding path program 5 times [2021-10-04 19:04:14,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:14,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346668403] [2021-10-04 19:04:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:14,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-04 19:04:14,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:14,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346668403] [2021-10-04 19:04:14,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346668403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:14,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461308115] [2021-10-04 19:04:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:04:14,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:14,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:14,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:14,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-04 19:04:14,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-04 19:04:14,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:04:14,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-04 19:04:14,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461308115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:14,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:14,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-10-04 19:04:14,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716523303] [2021-10-04 19:04:14,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:04:14,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:04:14,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:04:14,851 INFO L87 Difference]: Start difference. First operand 908 states and 3193 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:15,313 INFO L93 Difference]: Finished difference Result 1726 states and 5997 transitions. [2021-10-04 19:04:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-04 19:04:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-04 19:04:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:15,327 INFO L225 Difference]: With dead ends: 1726 [2021-10-04 19:04:15,327 INFO L226 Difference]: Without dead ends: 1390 [2021-10-04 19:04:15,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:04:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-10-04 19:04:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1094. [2021-10-04 19:04:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.5480329368709973) internal successors, (3878), 1093 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3878 transitions. [2021-10-04 19:04:15,377 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3878 transitions. Word has length 40 [2021-10-04 19:04:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:15,378 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 3878 transitions. [2021-10-04 19:04:15,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3878 transitions. [2021-10-04 19:04:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-04 19:04:15,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:15,383 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:15,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:15,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-04 19:04:15,598 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1860337029, now seen corresponding path program 6 times [2021-10-04 19:04:15,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:15,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39014050] [2021-10-04 19:04:15,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:15,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-04 19:04:15,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:15,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39014050] [2021-10-04 19:04:15,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39014050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:15,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993924105] [2021-10-04 19:04:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:04:15,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:15,703 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:15,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-04 19:04:15,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-04 19:04:15,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-04 19:04:16,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-04 19:04:16,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993924105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:16,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:16,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 19:04:16,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399303587] [2021-10-04 19:04:16,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 19:04:16,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 19:04:16,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-04 19:04:16,221 INFO L87 Difference]: Start difference. First operand 1094 states and 3878 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:16,618 INFO L93 Difference]: Finished difference Result 1766 states and 6344 transitions. [2021-10-04 19:04:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:04:16,619 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-04 19:04:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:16,636 INFO L225 Difference]: With dead ends: 1766 [2021-10-04 19:04:16,637 INFO L226 Difference]: Without dead ends: 1750 [2021-10-04 19:04:16,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=332, Invalid=724, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:04:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-10-04 19:04:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1220. [2021-10-04 19:04:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.545529122231337) internal successors, (4322), 1219 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 4322 transitions. [2021-10-04 19:04:16,706 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 4322 transitions. Word has length 42 [2021-10-04 19:04:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:16,707 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 4322 transitions. [2021-10-04 19:04:16,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 4322 transitions. [2021-10-04 19:04:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-04 19:04:16,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:16,713 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:16,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:16,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:16,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1673534370, now seen corresponding path program 7 times [2021-10-04 19:04:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:16,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630029180] [2021-10-04 19:04:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:16,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-04 19:04:17,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:17,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630029180] [2021-10-04 19:04:17,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630029180] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:17,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911767333] [2021-10-04 19:04:17,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:04:17,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:17,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:17,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:17,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-04 19:04:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:04:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-04 19:04:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911767333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:17,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-10-04 19:04:17,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006609804] [2021-10-04 19:04:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 19:04:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 19:04:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-04 19:04:17,392 INFO L87 Difference]: Start difference. First operand 1220 states and 4322 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:17,749 INFO L93 Difference]: Finished difference Result 2110 states and 7380 transitions. [2021-10-04 19:04:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:04:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-04 19:04:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:17,770 INFO L225 Difference]: With dead ends: 2110 [2021-10-04 19:04:17,770 INFO L226 Difference]: Without dead ends: 2002 [2021-10-04 19:04:17,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:04:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-10-04 19:04:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1550. [2021-10-04 19:04:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.564880568108457) internal successors, (5522), 1549 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5522 transitions. [2021-10-04 19:04:17,841 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5522 transitions. Word has length 45 [2021-10-04 19:04:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:17,842 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5522 transitions. [2021-10-04 19:04:17,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5522 transitions. [2021-10-04 19:04:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-04 19:04:17,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:17,849 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:17,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:18,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-04 19:04:18,064 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:18,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 380308863, now seen corresponding path program 8 times [2021-10-04 19:04:18,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:18,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055276740] [2021-10-04 19:04:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:18,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-04 19:04:18,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:18,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055276740] [2021-10-04 19:04:18,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055276740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:18,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227015210] [2021-10-04 19:04:18,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:04:18,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:18,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:18,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-04 19:04:18,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:04:18,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-04 19:04:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-04 19:04:18,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227015210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:18,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:18,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-04 19:04:18,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787571364] [2021-10-04 19:04:18,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:04:18,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:18,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:04:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:04:18,686 INFO L87 Difference]: Start difference. First operand 1550 states and 5522 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:19,124 INFO L93 Difference]: Finished difference Result 2883 states and 9819 transitions. [2021-10-04 19:04:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:04:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-04 19:04:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:19,141 INFO L225 Difference]: With dead ends: 2883 [2021-10-04 19:04:19,142 INFO L226 Difference]: Without dead ends: 1552 [2021-10-04 19:04:19,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:04:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-10-04 19:04:19,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1552. [2021-10-04 19:04:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.5615731785944553) internal successors, (5524), 1551 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5524 transitions. [2021-10-04 19:04:19,233 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5524 transitions. Word has length 48 [2021-10-04 19:04:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:19,234 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5524 transitions. [2021-10-04 19:04:19,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5524 transitions. [2021-10-04 19:04:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-04 19:04:19,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:04:19,241 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:04:19,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:19,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-04 19:04:19,455 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:04:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:04:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1009897724, now seen corresponding path program 9 times [2021-10-04 19:04:19,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:04:19,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460919196] [2021-10-04 19:04:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:04:19,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:04:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:04:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-10-04 19:04:19,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:04:19,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460919196] [2021-10-04 19:04:19,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460919196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:19,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383778591] [2021-10-04 19:04:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:04:19,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:04:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:04:19,608 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:04:19,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-04 19:04:19,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 19:04:19,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:04:19,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-04 19:04:19,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:04:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-04 19:04:20,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383778591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:04:20,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:04:20,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2021-10-04 19:04:20,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336994557] [2021-10-04 19:04:20,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 19:04:20,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:04:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 19:04:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-04 19:04:20,008 INFO L87 Difference]: Start difference. First operand 1552 states and 5524 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:04:21,375 INFO L93 Difference]: Finished difference Result 1770 states and 6261 transitions. [2021-10-04 19:04:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-04 19:04:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-04 19:04:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:04:21,376 INFO L225 Difference]: With dead ends: 1770 [2021-10-04 19:04:21,376 INFO L226 Difference]: Without dead ends: 0 [2021-10-04 19:04:21,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=1192, Invalid=3364, Unknown=0, NotChecked=0, Total=4556 [2021-10-04 19:04:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-04 19:04:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-04 19:04:21,379 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) [2021-10-04 19:04:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-04 19:04:21,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-10-04 19:04:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:04:21,379 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-04 19:04:21,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:04:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-04 19:04:21,380 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-04 19:04:21,384 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 19:04:21,385 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 19:04:21,385 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 19:04:21,385 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-04 19:04:21,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-04 19:04:21,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-04 19:04:21,604 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 19:04:21,604 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 19:04:21,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 07:04:21 BasicIcfg [2021-10-04 19:04:21,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 19:04:21,608 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 19:04:21,608 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 19:04:21,609 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 19:04:21,609 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:04:01" (3/4) ... [2021-10-04 19:04:21,613 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-04 19:04:21,622 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-04 19:04:21,622 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-04 19:04:21,622 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-04 19:04:21,629 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-04 19:04:21,630 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-04 19:04:21,630 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 19:04:21,673 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 19:04:21,674 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 19:04:21,675 INFO L168 Benchmark]: Toolchain (without parser) took 20845.82 ms. Allocated memory was 46.1 MB in the beginning and 151.0 MB in the end (delta: 104.9 MB). Free memory was 22.8 MB in the beginning and 93.5 MB in the end (delta: -70.7 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2021-10-04 19:04:21,676 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 37.7 MB. Free memory was 19.3 MB in the beginning and 19.2 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 19:04:21,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.59 ms. Allocated memory is still 46.1 MB. Free memory was 22.5 MB in the beginning and 23.2 MB in the end (delta: -708.9 kB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-04 19:04:21,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.01 ms. Allocated memory is still 46.1 MB. Free memory was 23.2 MB in the beginning and 21.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 19:04:21,677 INFO L168 Benchmark]: Boogie Preprocessor took 35.96 ms. Allocated memory is still 46.1 MB. Free memory was 21.5 MB in the beginning and 20.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 19:04:21,678 INFO L168 Benchmark]: RCFGBuilder took 614.02 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.0 MB in the beginning and 37.4 MB in the end (delta: -17.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-04 19:04:21,679 INFO L168 Benchmark]: TraceAbstraction took 19780.00 ms. Allocated memory was 56.6 MB in the beginning and 151.0 MB in the end (delta: 94.4 MB). Free memory was 37.0 MB in the beginning and 97.6 MB in the end (delta: -60.6 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.1 GB. [2021-10-04 19:04:21,679 INFO L168 Benchmark]: Witness Printer took 65.61 ms. Allocated memory is still 151.0 MB. Free memory was 96.5 MB in the beginning and 93.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 19:04:21,682 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 37.7 MB. Free memory was 19.3 MB in the beginning and 19.2 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.59 ms. Allocated memory is still 46.1 MB. Free memory was 22.5 MB in the beginning and 23.2 MB in the end (delta: -708.9 kB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.01 ms. Allocated memory is still 46.1 MB. Free memory was 23.2 MB in the beginning and 21.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.96 ms. Allocated memory is still 46.1 MB. Free memory was 21.5 MB in the beginning and 20.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 614.02 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.0 MB in the beginning and 37.4 MB in the end (delta: -17.5 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19780.00 ms. Allocated memory was 56.6 MB in the beginning and 151.0 MB in the end (delta: 94.4 MB). Free memory was 37.0 MB in the beginning and 97.6 MB in the end (delta: -60.6 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.1 GB. * Witness Printer took 65.61 ms. Allocated memory is still 151.0 MB. Free memory was 96.5 MB in the beginning and 93.5 MB in the end (delta: 3.1 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: 4558.5ms, 147 PlacesBefore, 38 PlacesAfterwards, 151 TransitionsBefore, 34 TransitionsAfterwards, 1714 CoEnabledTransitionPairs, 6 FixpointIterations, 79 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 132 TotalNumberOfCompositions, 2513 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1780, positive: 1701, positive conditional: 0, positive unconditional: 1701, negative: 79, negative conditional: 0, negative unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1088, positive: 1059, positive conditional: 0, positive unconditional: 1059, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1088, positive: 1059, positive conditional: 0, positive unconditional: 1059, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 29, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 91, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1780, positive: 642, positive conditional: 0, positive unconditional: 642, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 1088, unknown conditional: 0, unknown unconditional: 1088] , Statistics on independence cache: Total cache size (in pairs): 110, Positive cache size: 100, Positive conditional cache size: 0, Positive unconditional cache size: 100, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - 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: 62]: 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 7 procedures, 173 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 19512.4ms, OverallIterations: 17, TraceHistogramMax: 4, EmptinessCheckTime: 82.2ms, AutomataDifference: 4703.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4639.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 763 SDtfs, 2230 SDslu, 2833 SDs, 0 SdLazy, 2504 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1730.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 773 GetRequests, 481 SyntacticMatches, 6 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2552.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1552occurred in iteration=16, InterpolantAutomatonStates: 235, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 728.3ms AutomataMinimizationTime, 17 MinimizatonAttempts, 2566 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 251.3ms SsaConstructionTime, 1139.6ms SatisfiabilityAnalysisTime, 3381.8ms InterpolantComputationTime, 1028 NumberOfCodeBlocks, 1005 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 997 ConstructedInterpolants, 0 QuantifiedInterpolants, 3100 SizeOfPredicates, 45 NumberOfNonLiveVariables, 2816 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 363/518 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! [2021-10-04 19:04:21,733 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...