./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/commit-1.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-bad/commit-1.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 df91a67debf699bee0edd6df4b6eba5d1e6f3f03 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 21:46:40,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 21:46:40,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 21:46:40,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 21:46:40,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 21:46:40,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 21:46:40,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 21:46:40,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 21:46:40,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 21:46:40,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 21:46:40,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 21:46:40,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 21:46:40,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 21:46:40,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 21:46:40,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 21:46:40,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 21:46:40,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 21:46:40,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 21:46:40,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 21:46:40,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 21:46:40,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 21:46:40,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 21:46:40,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 21:46:40,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 21:46:40,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 21:46:40,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 21:46:40,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 21:46:40,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 21:46:40,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 21:46:40,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 21:46:40,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 21:46:40,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 21:46:40,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 21:46:40,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 21:46:40,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 21:46:40,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 21:46:40,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 21:46:40,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 21:46:40,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 21:46:40,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 21:46:40,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 21:46:40,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 21:46:40,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 21:46:40,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 21:46:40,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 21:46:40,419 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 21:46:40,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 21:46:40,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 21:46:40,422 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 21:46:40,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 21:46:40,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 21:46:40,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 21:46:40,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 21:46:40,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 21:46:40,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 21:46:40,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 21:46:40,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 21:46:40,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 21:46:40,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 21:46:40,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 21:46:40,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 21:46:40,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 21:46:40,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 21:46:40,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 21:46:40,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:46:40,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 21:46:40,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 21:46:40,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 21:46:40,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 21:46:40,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 21:46:40,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 21:46:40,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 21:46:40,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df91a67debf699bee0edd6df4b6eba5d1e6f3f03 [2021-10-05 21:46:40,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 21:46:40,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 21:46:40,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 21:46:40,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 21:46:40,834 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 21:46:40,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-05 21:46:40,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1968452c1/aaa3346ef3a245bbbad4d549af2a23b5/FLAGfc3aeac1b [2021-10-05 21:46:41,553 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 21:46:41,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-05 21:46:41,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1968452c1/aaa3346ef3a245bbbad4d549af2a23b5/FLAGfc3aeac1b [2021-10-05 21:46:41,580 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1968452c1/aaa3346ef3a245bbbad4d549af2a23b5 [2021-10-05 21:46:41,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 21:46:41,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 21:46:41,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 21:46:41,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 21:46:41,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 21:46:41,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:46:41" (1/1) ... [2021-10-05 21:46:41,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19672e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:41, skipping insertion in model container [2021-10-05 21:46:41,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:46:41" (1/1) ... [2021-10-05 21:46:41,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 21:46:41,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 21:46:41,902 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-bad/commit-1.wvr.c[4956,4969] [2021-10-05 21:46:41,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:46:41,927 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 21:46:41,998 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-bad/commit-1.wvr.c[4956,4969] [2021-10-05 21:46:42,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:46:42,019 INFO L208 MainTranslator]: Completed translation [2021-10-05 21:46:42,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42 WrapperNode [2021-10-05 21:46:42,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 21:46:42,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 21:46:42,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 21:46:42,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 21:46:42,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 21:46:42,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 21:46:42,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 21:46:42,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 21:46:42,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 21:46:42,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 21:46:42,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 21:46:42,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 21:46:42,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (1/1) ... [2021-10-05 21:46:42,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:46:42,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:46:42,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 21:46:42,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 21:46:42,254 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 21:46:42,254 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 21:46:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 21:46:42,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 21:46:42,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-05 21:46:42,255 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-05 21:46:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 21:46:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 21:46:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 21:46:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 21:46:42,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 21:46:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-05 21:46:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 21:46:42,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 21:46:42,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 21:46:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 21:46:42,259 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 21:46:43,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 21:46:43,428 INFO L299 CfgBuilder]: Removed 48 assume(true) statements. [2021-10-05 21:46:43,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:46:43 BoogieIcfgContainer [2021-10-05 21:46:43,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 21:46:43,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 21:46:43,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 21:46:43,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 21:46:43,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 09:46:41" (1/3) ... [2021-10-05 21:46:43,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35650937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:46:43, skipping insertion in model container [2021-10-05 21:46:43,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:46:42" (2/3) ... [2021-10-05 21:46:43,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35650937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:46:43, skipping insertion in model container [2021-10-05 21:46:43,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:46:43" (3/3) ... [2021-10-05 21:46:43,440 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.c [2021-10-05 21:46:43,446 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 21:46:43,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 21:46:43,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 21:46:43,447 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 21:46:43,484 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,485 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,486 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,487 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,487 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,488 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,488 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,489 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,489 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,489 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,490 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,490 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,491 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,491 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,491 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,492 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,493 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,493 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,493 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,494 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,494 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,495 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,495 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,495 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,495 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,496 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,496 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,496 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,497 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,497 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,497 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,497 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,498 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,498 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,498 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,498 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,499 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,499 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,500 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,500 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,500 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,500 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,501 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,501 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,501 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,501 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,502 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,502 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,502 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,503 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,503 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,503 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,504 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,504 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,504 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,504 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,505 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,505 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,505 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,506 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,506 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,506 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,506 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,507 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,507 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,508 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,514 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,514 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,514 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,518 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,519 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,519 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,519 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,519 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,520 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,520 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,520 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,521 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,522 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,523 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,523 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,523 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,524 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,524 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,524 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,524 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,525 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,525 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,525 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,525 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,525 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,527 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,527 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,527 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,528 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,528 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,528 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,528 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,528 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,529 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:46:43,535 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-05 21:46:43,584 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 21:46:43,592 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-05 21:46:43,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-05 21:46:43,611 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 21:46:43,622 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 225 transitions, 474 flow [2021-10-05 21:46:43,626 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 225 transitions, 474 flow [2021-10-05 21:46:43,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 211 places, 225 transitions, 474 flow [2021-10-05 21:46:43,715 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2021-10-05 21:46:43,715 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-05 21:46:43,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 222 events. 24/222 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 187. Up to 6 conditions per place. [2021-10-05 21:46:43,730 INFO L116 LiptonReduction]: Number of co-enabled transitions 2196 [2021-10-05 21:46:54,970 INFO L131 LiptonReduction]: Checked pairs total: 2142 [2021-10-05 21:46:54,970 INFO L133 LiptonReduction]: Total number of compositions: 236 [2021-10-05 21:46:54,977 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 29 transitions, 82 flow [2021-10-05 21:46:54,992 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 21:46:55,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:55,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:46:55,003 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:55,009 INFO L82 PathProgramCache]: Analyzing trace with hash 116542943, now seen corresponding path program 1 times [2021-10-05 21:46:55,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:55,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299075971] [2021-10-05 21:46:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:55,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:55,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:55,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299075971] [2021-10-05 21:46:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299075971] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:46:55,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:46:55,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-05 21:46:55,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803895163] [2021-10-05 21:46:55,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:46:55,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:46:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:46:55,483 INFO L87 Difference]: Start difference. First operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:55,521 INFO L93 Difference]: Finished difference Result 88 states and 251 transitions. [2021-10-05 21:46:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:46:55,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-05 21:46:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:55,535 INFO L225 Difference]: With dead ends: 88 [2021-10-05 21:46:55,535 INFO L226 Difference]: Without dead ends: 81 [2021-10-05 21:46:55,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:46:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-05 21:46:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-05 21:46:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.9125) internal successors, (233), 80 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 233 transitions. [2021-10-05 21:46:55,582 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 233 transitions. Word has length 19 [2021-10-05 21:46:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:55,583 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 233 transitions. [2021-10-05 21:46:55,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 233 transitions. [2021-10-05 21:46:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 21:46:55,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:55,586 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] [2021-10-05 21:46:55,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 21:46:55,586 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:55,587 INFO L82 PathProgramCache]: Analyzing trace with hash -223462236, now seen corresponding path program 1 times [2021-10-05 21:46:55,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:55,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522083377] [2021-10-05 21:46:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:55,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:55,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522083377] [2021-10-05 21:46:55,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522083377] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:46:55,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:46:55,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 21:46:55,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009031057] [2021-10-05 21:46:55,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:46:55,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:46:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:46:55,879 INFO L87 Difference]: Start difference. First operand 81 states and 233 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:55,896 INFO L93 Difference]: Finished difference Result 77 states and 211 transitions. [2021-10-05 21:46:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:46:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-05 21:46:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:55,899 INFO L225 Difference]: With dead ends: 77 [2021-10-05 21:46:55,899 INFO L226 Difference]: Without dead ends: 75 [2021-10-05 21:46:55,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:46:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-05 21:46:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-05 21:46:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.7837837837837838) internal successors, (206), 74 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 206 transitions. [2021-10-05 21:46:55,912 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 206 transitions. Word has length 20 [2021-10-05 21:46:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:55,912 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 206 transitions. [2021-10-05 21:46:55,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 206 transitions. [2021-10-05 21:46:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 21:46:55,915 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:55,915 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] [2021-10-05 21:46:55,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 21:46:55,915 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:55,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:55,916 INFO L82 PathProgramCache]: Analyzing trace with hash -639279292, now seen corresponding path program 1 times [2021-10-05 21:46:55,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:55,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868763115] [2021-10-05 21:46:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:55,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:56,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:56,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868763115] [2021-10-05 21:46:56,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868763115] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:46:56,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:46:56,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 21:46:56,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309707503] [2021-10-05 21:46:56,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:46:56,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:46:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:46:56,036 INFO L87 Difference]: Start difference. First operand 75 states and 206 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:56,094 INFO L93 Difference]: Finished difference Result 171 states and 449 transitions. [2021-10-05 21:46:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 21:46:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-05 21:46:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:56,098 INFO L225 Difference]: With dead ends: 171 [2021-10-05 21:46:56,099 INFO L226 Difference]: Without dead ends: 165 [2021-10-05 21:46:56,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 21:46:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-05 21:46:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-10-05 21:46:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.7596153846153846) internal successors, (287), 104 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 287 transitions. [2021-10-05 21:46:56,116 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 287 transitions. Word has length 20 [2021-10-05 21:46:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:56,117 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 287 transitions. [2021-10-05 21:46:56,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 287 transitions. [2021-10-05 21:46:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-05 21:46:56,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:56,120 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] [2021-10-05 21:46:56,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 21:46:56,120 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:56,121 INFO L82 PathProgramCache]: Analyzing trace with hash 785551347, now seen corresponding path program 1 times [2021-10-05 21:46:56,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:56,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973077234] [2021-10-05 21:46:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:56,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:56,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:56,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973077234] [2021-10-05 21:46:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973077234] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:46:56,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:46:56,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:46:56,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648161996] [2021-10-05 21:46:56,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:46:56,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:46:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:46:56,202 INFO L87 Difference]: Start difference. First operand 105 states and 287 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:56,238 INFO L93 Difference]: Finished difference Result 105 states and 255 transitions. [2021-10-05 21:46:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:46:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-05 21:46:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:56,240 INFO L225 Difference]: With dead ends: 105 [2021-10-05 21:46:56,241 INFO L226 Difference]: Without dead ends: 76 [2021-10-05 21:46:56,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:46:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-05 21:46:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-05 21:46:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.76) internal successors, (207), 75 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 207 transitions. [2021-10-05 21:46:56,250 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 207 transitions. Word has length 20 [2021-10-05 21:46:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:56,250 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 207 transitions. [2021-10-05 21:46:56,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 207 transitions. [2021-10-05 21:46:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:46:56,252 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:56,253 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] [2021-10-05 21:46:56,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 21:46:56,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:56,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2010309788, now seen corresponding path program 1 times [2021-10-05 21:46:56,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:56,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941809181] [2021-10-05 21:46:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:56,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:46:56,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:56,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941809181] [2021-10-05 21:46:56,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941809181] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:46:56,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:46:56,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 21:46:56,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879989089] [2021-10-05 21:46:56,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:46:56,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:56,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:46:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:46:56,342 INFO L87 Difference]: Start difference. First operand 76 states and 207 transitions. Second operand has 4 states, 4 states have (on average 5.25) 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) [2021-10-05 21:46:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:56,370 INFO L93 Difference]: Finished difference Result 128 states and 335 transitions. [2021-10-05 21:46:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:46:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) 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 [2021-10-05 21:46:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:56,372 INFO L225 Difference]: With dead ends: 128 [2021-10-05 21:46:56,373 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:46:56,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:46:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:46:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-10-05 21:46:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.671232876712329) internal successors, (195), 73 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 195 transitions. [2021-10-05 21:46:56,392 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 195 transitions. Word has length 21 [2021-10-05 21:46:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:56,393 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 195 transitions. [2021-10-05 21:46:56,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) 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) [2021-10-05 21:46:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 195 transitions. [2021-10-05 21:46:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 21:46:56,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:56,397 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] [2021-10-05 21:46:56,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 21:46:56,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash -859826869, now seen corresponding path program 1 times [2021-10-05 21:46:56,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:56,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372679816] [2021-10-05 21:46:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:56,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:46:56,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:56,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372679816] [2021-10-05 21:46:56,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372679816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:46:56,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319335970] [2021-10-05 21:46:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:56,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:46:56,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:46:56,573 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) [2021-10-05 21:46:56,596 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 [2021-10-05 21:46:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 21:46:56,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:46:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:46:57,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319335970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:46:57,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:46:57,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-10-05 21:46:57,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765410616] [2021-10-05 21:46:57,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 21:46:57,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 21:46:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:46:57,132 INFO L87 Difference]: Start difference. First operand 74 states and 195 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:57,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:57,154 INFO L93 Difference]: Finished difference Result 103 states and 272 transitions. [2021-10-05 21:46:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:46:57,154 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 [2021-10-05 21:46:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:57,156 INFO L225 Difference]: With dead ends: 103 [2021-10-05 21:46:57,156 INFO L226 Difference]: Without dead ends: 92 [2021-10-05 21:46:57,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 21:46:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-05 21:46:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-05 21:46:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.6923076923076925) internal successors, (245), 91 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 245 transitions. [2021-10-05 21:46:57,172 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 245 transitions. Word has length 21 [2021-10-05 21:46:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:57,172 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 245 transitions. [2021-10-05 21:46:57,173 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) [2021-10-05 21:46:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 245 transitions. [2021-10-05 21:46:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 21:46:57,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:57,178 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:46:57,222 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 [2021-10-05 21:46:57,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:46:57,393 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash 582858247, now seen corresponding path program 2 times [2021-10-05 21:46:57,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:57,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714576056] [2021-10-05 21:46:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:57,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:57,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:57,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714576056] [2021-10-05 21:46:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714576056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:46:57,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6442039] [2021-10-05 21:46:57,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:46:57,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:46:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:46:57,634 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) [2021-10-05 21:46:57,660 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 [2021-10-05 21:46:57,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:46:57,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:46:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 21:46:57,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:46:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:46:58,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6442039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:46:58,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:46:58,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-05 21:46:58,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362945009] [2021-10-05 21:46:58,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 21:46:58,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 21:46:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:46:58,201 INFO L87 Difference]: Start difference. First operand 92 states and 245 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:46:58,484 INFO L93 Difference]: Finished difference Result 350 states and 808 transitions. [2021-10-05 21:46:58,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:46:58,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-05 21:46:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:46:58,487 INFO L225 Difference]: With dead ends: 350 [2021-10-05 21:46:58,487 INFO L226 Difference]: Without dead ends: 240 [2021-10-05 21:46:58,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:46:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-05 21:46:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 158. [2021-10-05 21:46:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.5859872611464967) internal successors, (406), 157 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 406 transitions. [2021-10-05 21:46:58,498 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 406 transitions. Word has length 22 [2021-10-05 21:46:58,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:46:58,498 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 406 transitions. [2021-10-05 21:46:58,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:46:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 406 transitions. [2021-10-05 21:46:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-05 21:46:58,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:46:58,500 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] [2021-10-05 21:46:58,539 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 [2021-10-05 21:46:58,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-05 21:46:58,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:46:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:46:58,715 INFO L82 PathProgramCache]: Analyzing trace with hash 272184246, now seen corresponding path program 1 times [2021-10-05 21:46:58,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:46:58,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077195214] [2021-10-05 21:46:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:58,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:46:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:59,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:46:59,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077195214] [2021-10-05 21:46:59,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077195214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:46:59,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326280175] [2021-10-05 21:46:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:46:59,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:46:59,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:46:59,218 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) [2021-10-05 21:46:59,221 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 [2021-10-05 21:46:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:46:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 21:46:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:46:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-05 21:46:59,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 21:46:59,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:46:59,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:46:59,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:46:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:46:59,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326280175] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:46:59,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:46:59,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-05 21:46:59,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598644347] [2021-10-05 21:46:59,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:46:59,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:46:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:46:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:46:59,962 INFO L87 Difference]: Start difference. First operand 158 states and 406 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:00,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:00,318 INFO L93 Difference]: Finished difference Result 211 states and 557 transitions. [2021-10-05 21:47:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:47:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-05 21:47:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:00,322 INFO L225 Difference]: With dead ends: 211 [2021-10-05 21:47:00,322 INFO L226 Difference]: Without dead ends: 198 [2021-10-05 21:47:00,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:47:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-05 21:47:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2021-10-05 21:47:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.67027027027027) internal successors, (494), 185 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 494 transitions. [2021-10-05 21:47:00,332 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 494 transitions. Word has length 22 [2021-10-05 21:47:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:00,333 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 494 transitions. [2021-10-05 21:47:00,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 494 transitions. [2021-10-05 21:47:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 21:47:00,335 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:00,335 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:00,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-05 21:47:00,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:00,550 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash -388316402, now seen corresponding path program 2 times [2021-10-05 21:47:00,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:00,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68505740] [2021-10-05 21:47:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:00,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:47:01,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:01,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68505740] [2021-10-05 21:47:01,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68505740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:01,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910016381] [2021-10-05 21:47:01,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:47:01,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:01,558 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) [2021-10-05 21:47:01,569 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 [2021-10-05 21:47:01,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:47:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-05 21:47:01,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:47:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910016381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:01,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:01,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-10-05 21:47:01,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353957841] [2021-10-05 21:47:01,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 21:47:01,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 21:47:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-05 21:47:01,965 INFO L87 Difference]: Start difference. First operand 186 states and 494 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:02,254 INFO L93 Difference]: Finished difference Result 302 states and 777 transitions. [2021-10-05 21:47:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 21:47:02,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 21:47:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:02,258 INFO L225 Difference]: With dead ends: 302 [2021-10-05 21:47:02,258 INFO L226 Difference]: Without dead ends: 289 [2021-10-05 21:47:02,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:47:02,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-05 21:47:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 192. [2021-10-05 21:47:02,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.769633507853403) internal successors, (529), 191 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 529 transitions. [2021-10-05 21:47:02,267 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 529 transitions. Word has length 23 [2021-10-05 21:47:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:02,268 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 529 transitions. [2021-10-05 21:47:02,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 529 transitions. [2021-10-05 21:47:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 21:47:02,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:02,270 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:02,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:02,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:02,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash 602101569, now seen corresponding path program 3 times [2021-10-05 21:47:02,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:02,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645860074] [2021-10-05 21:47:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:02,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:02,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:02,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645860074] [2021-10-05 21:47:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645860074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:02,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423335408] [2021-10-05 21:47:02,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:47:02,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:02,578 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) [2021-10-05 21:47:02,603 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 [2021-10-05 21:47:02,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:47:02,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:02,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-05 21:47:02,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:03,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423335408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:03,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:03,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-05 21:47:03,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389329739] [2021-10-05 21:47:03,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 21:47:03,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 21:47:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:47:03,028 INFO L87 Difference]: Start difference. First operand 192 states and 529 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:03,111 INFO L93 Difference]: Finished difference Result 440 states and 1144 transitions. [2021-10-05 21:47:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:47:03,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-05 21:47:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:03,115 INFO L225 Difference]: With dead ends: 440 [2021-10-05 21:47:03,116 INFO L226 Difference]: Without dead ends: 428 [2021-10-05 21:47:03,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-05 21:47:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-10-05 21:47:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 274. [2021-10-05 21:47:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.717948717948718) internal successors, (742), 273 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:03,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 742 transitions. [2021-10-05 21:47:03,129 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 742 transitions. Word has length 23 [2021-10-05 21:47:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:03,130 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 742 transitions. [2021-10-05 21:47:03,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 742 transitions. [2021-10-05 21:47:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-05 21:47:03,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:03,132 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] [2021-10-05 21:47:03,174 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 [2021-10-05 21:47:03,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:03,346 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1429884047, now seen corresponding path program 1 times [2021-10-05 21:47:03,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:03,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227774109] [2021-10-05 21:47:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:03,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:47:03,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:03,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227774109] [2021-10-05 21:47:03,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227774109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:03,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978382632] [2021-10-05 21:47:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:03,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:03,531 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) [2021-10-05 21:47:03,553 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 [2021-10-05 21:47:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-05 21:47:03,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:04,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978382632] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:47:04,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-05 21:47:04,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-10-05 21:47:04,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527304463] [2021-10-05 21:47:04,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 21:47:04,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 21:47:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-05 21:47:04,042 INFO L87 Difference]: Start difference. First operand 274 states and 742 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-10-05 21:47:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:04,127 INFO L93 Difference]: Finished difference Result 292 states and 734 transitions. [2021-10-05 21:47:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:47:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 [2021-10-05 21:47:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:04,131 INFO L225 Difference]: With dead ends: 292 [2021-10-05 21:47:04,131 INFO L226 Difference]: Without dead ends: 254 [2021-10-05 21:47:04,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-05 21:47:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-10-05 21:47:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 232. [2021-10-05 21:47:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.670995670995671) internal successors, (617), 231 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 617 transitions. [2021-10-05 21:47:04,143 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 617 transitions. Word has length 23 [2021-10-05 21:47:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:04,143 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 617 transitions. [2021-10-05 21:47:04,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2021-10-05 21:47:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 617 transitions. [2021-10-05 21:47:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 21:47:04,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:04,145 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:04,184 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 [2021-10-05 21:47:04,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-05 21:47:04,358 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:04,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2097684022, now seen corresponding path program 1 times [2021-10-05 21:47:04,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:04,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941925972] [2021-10-05 21:47:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:04,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:47:04,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:04,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941925972] [2021-10-05 21:47:04,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941925972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:04,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871157319] [2021-10-05 21:47:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:04,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:04,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:04,479 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) [2021-10-05 21:47:04,503 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 [2021-10-05 21:47:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-05 21:47:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:47:04,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871157319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:04,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-05 21:47:04,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786541312] [2021-10-05 21:47:04,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-05 21:47:04,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-05 21:47:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-05 21:47:04,857 INFO L87 Difference]: Start difference. First operand 232 states and 617 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:04,906 INFO L93 Difference]: Finished difference Result 216 states and 531 transitions. [2021-10-05 21:47:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 21:47:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 21:47:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:04,909 INFO L225 Difference]: With dead ends: 216 [2021-10-05 21:47:04,909 INFO L226 Difference]: Without dead ends: 190 [2021-10-05 21:47:04,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-05 21:47:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-05 21:47:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 157. [2021-10-05 21:47:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5705128205128207) internal successors, (401), 156 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 401 transitions. [2021-10-05 21:47:04,917 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 401 transitions. Word has length 24 [2021-10-05 21:47:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:04,917 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 401 transitions. [2021-10-05 21:47:04,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 401 transitions. [2021-10-05 21:47:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 21:47:04,919 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:04,919 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:04,957 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 [2021-10-05 21:47:05,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:05,133 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:05,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1610080812, now seen corresponding path program 1 times [2021-10-05 21:47:05,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:05,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138229642] [2021-10-05 21:47:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:05,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:05,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:05,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138229642] [2021-10-05 21:47:05,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138229642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:05,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209276280] [2021-10-05 21:47:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:05,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:05,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:05,665 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) [2021-10-05 21:47:05,680 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 [2021-10-05 21:47:05,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:05,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 21:47:05,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:47:06,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209276280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:06,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:06,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2021-10-05 21:47:06,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624884048] [2021-10-05 21:47:06,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:47:06,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:06,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:47:06,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:47:06,241 INFO L87 Difference]: Start difference. First operand 157 states and 401 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:06,434 INFO L93 Difference]: Finished difference Result 235 states and 605 transitions. [2021-10-05 21:47:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:47:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 21:47:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:06,437 INFO L225 Difference]: With dead ends: 235 [2021-10-05 21:47:06,437 INFO L226 Difference]: Without dead ends: 222 [2021-10-05 21:47:06,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:47:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-10-05 21:47:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 187. [2021-10-05 21:47:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.7419354838709675) internal successors, (510), 186 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 510 transitions. [2021-10-05 21:47:06,446 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 510 transitions. Word has length 24 [2021-10-05 21:47:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:06,446 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 510 transitions. [2021-10-05 21:47:06,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 510 transitions. [2021-10-05 21:47:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-05 21:47:06,448 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:06,448 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:06,493 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 [2021-10-05 21:47:06,661 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,SelfDestructingSolverStorable12 [2021-10-05 21:47:06,662 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:06,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:06,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1607853721, now seen corresponding path program 1 times [2021-10-05 21:47:06,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:06,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614004578] [2021-10-05 21:47:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:06,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:06,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:06,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614004578] [2021-10-05 21:47:06,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614004578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:06,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507223017] [2021-10-05 21:47:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:06,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:06,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:06,796 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) [2021-10-05 21:47:06,814 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 [2021-10-05 21:47:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:07,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-05 21:47:07,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:47:07,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507223017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:07,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:07,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-10-05 21:47:07,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775808860] [2021-10-05 21:47:07,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 21:47:07,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 21:47:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-05 21:47:07,424 INFO L87 Difference]: Start difference. First operand 187 states and 510 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:07,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:07,666 INFO L93 Difference]: Finished difference Result 296 states and 720 transitions. [2021-10-05 21:47:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:47:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-05 21:47:07,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:07,669 INFO L225 Difference]: With dead ends: 296 [2021-10-05 21:47:07,670 INFO L226 Difference]: Without dead ends: 232 [2021-10-05 21:47:07,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:47:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-10-05 21:47:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 130. [2021-10-05 21:47:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.682170542635659) internal successors, (346), 129 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 346 transitions. [2021-10-05 21:47:07,676 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 346 transitions. Word has length 24 [2021-10-05 21:47:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:07,677 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 346 transitions. [2021-10-05 21:47:07,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 346 transitions. [2021-10-05 21:47:07,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 21:47:07,678 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:07,678 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:07,717 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 [2021-10-05 21:47:07,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:07,893 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1913540381, now seen corresponding path program 2 times [2021-10-05 21:47:07,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:07,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287417203] [2021-10-05 21:47:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:07,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:47:08,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:08,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287417203] [2021-10-05 21:47:08,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287417203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:08,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40027470] [2021-10-05 21:47:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:47:08,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:08,134 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) [2021-10-05 21:47:08,135 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 [2021-10-05 21:47:08,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:47:08,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:08,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-05 21:47:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:08,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40027470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:08,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:08,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-05 21:47:08,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660777678] [2021-10-05 21:47:08,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:47:08,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:08,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:47:08,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:47:08,924 INFO L87 Difference]: Start difference. First operand 130 states and 346 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:09,184 INFO L93 Difference]: Finished difference Result 159 states and 394 transitions. [2021-10-05 21:47:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:47:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 21:47:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:09,186 INFO L225 Difference]: With dead ends: 159 [2021-10-05 21:47:09,186 INFO L226 Difference]: Without dead ends: 131 [2021-10-05 21:47:09,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:47:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-05 21:47:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 114. [2021-10-05 21:47:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.5398230088495577) internal successors, (287), 113 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2021-10-05 21:47:09,194 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 25 [2021-10-05 21:47:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:09,194 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2021-10-05 21:47:09,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:09,195 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2021-10-05 21:47:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-05 21:47:09,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:09,196 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:09,235 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 [2021-10-05 21:47:09,406 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,SelfDestructingSolverStorable14 [2021-10-05 21:47:09,407 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:09,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1813794031, now seen corresponding path program 1 times [2021-10-05 21:47:09,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:09,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934953159] [2021-10-05 21:47:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:09,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:09,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:09,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934953159] [2021-10-05 21:47:09,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934953159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:09,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174367569] [2021-10-05 21:47:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:09,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:09,907 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) [2021-10-05 21:47:09,911 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 [2021-10-05 21:47:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-05 21:47:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-05 21:47:10,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 21:47:10,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 21:47:10,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 21:47:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:10,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174367569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:10,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:10,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2021-10-05 21:47:10,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67782079] [2021-10-05 21:47:10,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:47:10,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:10,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:47:10,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:47:10,928 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:11,759 INFO L93 Difference]: Finished difference Result 251 states and 655 transitions. [2021-10-05 21:47:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:47:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-05 21:47:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:11,762 INFO L225 Difference]: With dead ends: 251 [2021-10-05 21:47:11,762 INFO L226 Difference]: Without dead ends: 238 [2021-10-05 21:47:11,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:47:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-10-05 21:47:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2021-10-05 21:47:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.748633879781421) internal successors, (503), 183 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 503 transitions. [2021-10-05 21:47:11,769 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 503 transitions. Word has length 25 [2021-10-05 21:47:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:11,770 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 503 transitions. [2021-10-05 21:47:11,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 503 transitions. [2021-10-05 21:47:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 21:47:11,772 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:11,772 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:11,807 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 [2021-10-05 21:47:11,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:11,986 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1712250652, now seen corresponding path program 2 times [2021-10-05 21:47:11,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:11,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031671033] [2021-10-05 21:47:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:11,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:12,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:12,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031671033] [2021-10-05 21:47:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031671033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:12,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500069921] [2021-10-05 21:47:12,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:47:12,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:12,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:12,948 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) [2021-10-05 21:47:12,970 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 [2021-10-05 21:47:13,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:47:13,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:13,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 21:47:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500069921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:13,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:13,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-05 21:47:13,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231622557] [2021-10-05 21:47:13,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:47:13,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:47:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:47:13,820 INFO L87 Difference]: Start difference. First operand 184 states and 503 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:14,748 INFO L93 Difference]: Finished difference Result 366 states and 996 transitions. [2021-10-05 21:47:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:47:14,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 21:47:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:14,752 INFO L225 Difference]: With dead ends: 366 [2021-10-05 21:47:14,752 INFO L226 Difference]: Without dead ends: 353 [2021-10-05 21:47:14,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:47:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-05 21:47:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 169. [2021-10-05 21:47:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.892857142857143) internal successors, (486), 168 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 486 transitions. [2021-10-05 21:47:14,761 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 486 transitions. Word has length 26 [2021-10-05 21:47:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:14,761 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 486 transitions. [2021-10-05 21:47:14,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 486 transitions. [2021-10-05 21:47:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 21:47:14,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:14,762 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:14,801 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 [2021-10-05 21:47:14,976 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,SelfDestructingSolverStorable16 [2021-10-05 21:47:14,977 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:14,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:14,978 INFO L82 PathProgramCache]: Analyzing trace with hash 311412292, now seen corresponding path program 3 times [2021-10-05 21:47:14,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:14,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126266995] [2021-10-05 21:47:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:14,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:47:15,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:15,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126266995] [2021-10-05 21:47:15,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126266995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:15,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096075835] [2021-10-05 21:47:15,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:47:15,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:15,090 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) [2021-10-05 21:47:15,097 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 [2021-10-05 21:47:15,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 21:47:15,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 21:47:15,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:15,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096075835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:15,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:15,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-10-05 21:47:15,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266395513] [2021-10-05 21:47:15,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:47:15,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:47:15,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:47:15,873 INFO L87 Difference]: Start difference. First operand 169 states and 486 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:16,053 INFO L93 Difference]: Finished difference Result 402 states and 1113 transitions. [2021-10-05 21:47:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:47:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-05 21:47:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:16,057 INFO L225 Difference]: With dead ends: 402 [2021-10-05 21:47:16,058 INFO L226 Difference]: Without dead ends: 386 [2021-10-05 21:47:16,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:47:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-10-05 21:47:16,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 280. [2021-10-05 21:47:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-10-05 21:47:16,070 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 26 [2021-10-05 21:47:16,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:16,071 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-10-05 21:47:16,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-10-05 21:47:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-05 21:47:16,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:16,073 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:16,106 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 [2021-10-05 21:47:16,288 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,SelfDestructingSolverStorable17 [2021-10-05 21:47:16,289 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:16,290 INFO L82 PathProgramCache]: Analyzing trace with hash 361284422, now seen corresponding path program 4 times [2021-10-05 21:47:16,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:16,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393850448] [2021-10-05 21:47:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:16,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:16,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:16,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393850448] [2021-10-05 21:47:16,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393850448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:16,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308631040] [2021-10-05 21:47:16,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:47:16,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:16,541 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) [2021-10-05 21:47:16,544 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 [2021-10-05 21:47:16,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:47:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:16,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 21:47:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:47:17,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308631040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:17,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:17,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-05 21:47:17,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616967590] [2021-10-05 21:47:17,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:47:17,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:17,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:47:17,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:47:17,942 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-10-05 21:47:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:18,405 INFO L93 Difference]: Finished difference Result 366 states and 984 transitions. [2021-10-05 21:47:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:47:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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 26 [2021-10-05 21:47:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:18,410 INFO L225 Difference]: With dead ends: 366 [2021-10-05 21:47:18,411 INFO L226 Difference]: Without dead ends: 329 [2021-10-05 21:47:18,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 509.7ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:47:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-10-05 21:47:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 263. [2021-10-05 21:47:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.885496183206107) internal successors, (756), 262 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 756 transitions. [2021-10-05 21:47:18,431 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 756 transitions. Word has length 26 [2021-10-05 21:47:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:18,432 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 756 transitions. [2021-10-05 21:47:18,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 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) [2021-10-05 21:47:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 756 transitions. [2021-10-05 21:47:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-05 21:47:18,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:18,434 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] [2021-10-05 21:47:18,471 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 [2021-10-05 21:47:18,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:18,649 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:18,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1767249508, now seen corresponding path program 5 times [2021-10-05 21:47:18,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:18,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152437224] [2021-10-05 21:47:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:18,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:47:19,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:19,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152437224] [2021-10-05 21:47:19,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152437224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:19,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595210953] [2021-10-05 21:47:19,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:47:19,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:19,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:19,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-05 21:47:19,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 21:47:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-05 21:47:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:19,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 21:47:19,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 21:47:19,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 21:47:19,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-05 21:47:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:47:20,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595210953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:20,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:20,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 20 [2021-10-05 21:47:20,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913823881] [2021-10-05 21:47:20,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-05 21:47:20,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-05 21:47:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:47:20,486 INFO L87 Difference]: Start difference. First operand 263 states and 756 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2021-10-05 21:47:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:22,095 INFO L93 Difference]: Finished difference Result 504 states and 1425 transitions. [2021-10-05 21:47:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-05 21:47:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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 27 [2021-10-05 21:47:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:22,101 INFO L225 Difference]: With dead ends: 504 [2021-10-05 21:47:22,101 INFO L226 Difference]: Without dead ends: 491 [2021-10-05 21:47:22,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1482.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-10-05 21:47:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-10-05 21:47:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 334. [2021-10-05 21:47:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.945945945945946) internal successors, (981), 333 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 981 transitions. [2021-10-05 21:47:22,118 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 981 transitions. Word has length 27 [2021-10-05 21:47:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:22,118 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 981 transitions. [2021-10-05 21:47:22,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2021-10-05 21:47:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 981 transitions. [2021-10-05 21:47:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-05 21:47:22,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:22,120 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] [2021-10-05 21:47:22,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:22,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:22,334 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:22,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1136066660, now seen corresponding path program 1 times [2021-10-05 21:47:22,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:22,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366719254] [2021-10-05 21:47:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:22,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 21:47:22,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:22,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366719254] [2021-10-05 21:47:22,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366719254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:22,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218098210] [2021-10-05 21:47:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:22,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:22,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:22,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-05 21:47:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 21:47:22,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 21:47:25,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218098210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:25,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:25,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-10-05 21:47:25,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122045327] [2021-10-05 21:47:25,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-05 21:47:25,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-05 21:47:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-10-05 21:47:25,488 INFO L87 Difference]: Start difference. First operand 334 states and 981 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:25,634 INFO L93 Difference]: Finished difference Result 338 states and 837 transitions. [2021-10-05 21:47:25,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:47:25,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-05 21:47:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:25,636 INFO L225 Difference]: With dead ends: 338 [2021-10-05 21:47:25,636 INFO L226 Difference]: Without dead ends: 255 [2021-10-05 21:47:25,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2201.5ms TimeCoverageRelationStatistics Valid=31, Invalid=78, Unknown=1, NotChecked=0, Total=110 [2021-10-05 21:47:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-05 21:47:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 173. [2021-10-05 21:47:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.505813953488372) internal successors, (431), 172 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 431 transitions. [2021-10-05 21:47:25,643 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 431 transitions. Word has length 27 [2021-10-05 21:47:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:25,644 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 431 transitions. [2021-10-05 21:47:25,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 431 transitions. [2021-10-05 21:47:25,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 21:47:25,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:25,645 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:25,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:25,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-05 21:47:25,857 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash -849716615, now seen corresponding path program 6 times [2021-10-05 21:47:25,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:25,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930341621] [2021-10-05 21:47:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:25,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:47:26,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:26,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930341621] [2021-10-05 21:47:26,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930341621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:26,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64945780] [2021-10-05 21:47:26,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:47:26,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:26,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:26,986 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:26,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-05 21:47:27,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 21:47:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 21:47:27,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:47:28,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64945780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:28,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:28,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-05 21:47:28,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858642776] [2021-10-05 21:47:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 21:47:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 21:47:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:47:28,187 INFO L87 Difference]: Start difference. First operand 173 states and 431 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:29,550 INFO L93 Difference]: Finished difference Result 314 states and 719 transitions. [2021-10-05 21:47:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 21:47:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 21:47:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:29,552 INFO L225 Difference]: With dead ends: 314 [2021-10-05 21:47:29,552 INFO L226 Difference]: Without dead ends: 301 [2021-10-05 21:47:29,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1419.3ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 21:47:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-10-05 21:47:29,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 133. [2021-10-05 21:47:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.628787878787879) internal successors, (347), 132 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 347 transitions. [2021-10-05 21:47:29,560 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 347 transitions. Word has length 28 [2021-10-05 21:47:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:29,560 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 347 transitions. [2021-10-05 21:47:29,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 347 transitions. [2021-10-05 21:47:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 21:47:29,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:29,561 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:29,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:29,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:29,762 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:29,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1754292505, now seen corresponding path program 7 times [2021-10-05 21:47:29,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:29,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429132525] [2021-10-05 21:47:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:29,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:47:30,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:30,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429132525] [2021-10-05 21:47:30,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429132525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:30,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543073255] [2021-10-05 21:47:30,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:47:30,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:30,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:30,011 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:30,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-05 21:47:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:30,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-05 21:47:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:47:30,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543073255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:30,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:30,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-10-05 21:47:30,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458684177] [2021-10-05 21:47:30,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:47:30,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:47:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:47:30,992 INFO L87 Difference]: Start difference. First operand 133 states and 347 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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) [2021-10-05 21:47:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:31,423 INFO L93 Difference]: Finished difference Result 517 states and 1399 transitions. [2021-10-05 21:47:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-05 21:47:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 28 [2021-10-05 21:47:31,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:31,428 INFO L225 Difference]: With dead ends: 517 [2021-10-05 21:47:31,428 INFO L226 Difference]: Without dead ends: 493 [2021-10-05 21:47:31,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:47:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-10-05 21:47:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 257. [2021-10-05 21:47:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.0234375) internal successors, (774), 256 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 774 transitions. [2021-10-05 21:47:31,442 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 774 transitions. Word has length 28 [2021-10-05 21:47:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:31,443 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 774 transitions. [2021-10-05 21:47:31,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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) [2021-10-05 21:47:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 774 transitions. [2021-10-05 21:47:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-05 21:47:31,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:31,444 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:31,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-05 21:47:31,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:31,658 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1804164635, now seen corresponding path program 8 times [2021-10-05 21:47:31,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:31,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151049833] [2021-10-05 21:47:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:31,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:32,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:32,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151049833] [2021-10-05 21:47:32,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151049833] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:32,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089278353] [2021-10-05 21:47:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:47:32,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:32,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:32,368 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:32,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-05 21:47:32,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:47:32,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-05 21:47:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:33,086 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-05 21:47:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 108 [2021-10-05 21:47:34,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 21:47:35,088 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-05 21:47:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-05 21:47:37,831 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-05 21:47:37,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-05 21:47:38,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-10-05 21:47:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:47:38,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:47:38,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:47:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:47:39,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089278353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:39,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:39,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 25 [2021-10-05 21:47:39,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402187654] [2021-10-05 21:47:39,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-05 21:47:39,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-05 21:47:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:47:39,507 INFO L87 Difference]: Start difference. First operand 257 states and 774 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:41,214 INFO L93 Difference]: Finished difference Result 480 states and 1330 transitions. [2021-10-05 21:47:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 21:47:41,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-05 21:47:41,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:41,219 INFO L225 Difference]: With dead ends: 480 [2021-10-05 21:47:41,219 INFO L226 Difference]: Without dead ends: 459 [2021-10-05 21:47:41,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2127.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 21:47:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-10-05 21:47:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 421. [2021-10-05 21:47:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.8261904761904764) internal successors, (1187), 420 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1187 transitions. [2021-10-05 21:47:41,235 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1187 transitions. Word has length 28 [2021-10-05 21:47:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:41,236 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1187 transitions. [2021-10-05 21:47:41,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1187 transitions. [2021-10-05 21:47:41,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:47:41,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:41,238 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:41,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:41,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-05 21:47:41,452 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1369967475, now seen corresponding path program 9 times [2021-10-05 21:47:41,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:41,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647805569] [2021-10-05 21:47:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:41,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:47:42,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:42,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647805569] [2021-10-05 21:47:42,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647805569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:42,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428046032] [2021-10-05 21:47:42,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:47:42,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:42,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:42,410 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:42,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-05 21:47:43,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 21:47:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:43,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:47:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:44,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428046032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:44,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:44,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-05 21:47:44,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10477106] [2021-10-05 21:47:44,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-05 21:47:44,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:44,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-05 21:47:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:47:44,242 INFO L87 Difference]: Start difference. First operand 421 states and 1187 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2021-10-05 21:47:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:45,839 INFO L93 Difference]: Finished difference Result 608 states and 1671 transitions. [2021-10-05 21:47:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-05 21:47:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 25 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 29 [2021-10-05 21:47:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:45,844 INFO L225 Difference]: With dead ends: 608 [2021-10-05 21:47:45,844 INFO L226 Difference]: Without dead ends: 587 [2021-10-05 21:47:45,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1807.8ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-10-05 21:47:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-10-05 21:47:45,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 379. [2021-10-05 21:47:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9497354497354498) internal successors, (1115), 378 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1115 transitions. [2021-10-05 21:47:45,861 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1115 transitions. Word has length 29 [2021-10-05 21:47:45,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:45,861 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1115 transitions. [2021-10-05 21:47:45,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 25 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) [2021-10-05 21:47:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1115 transitions. [2021-10-05 21:47:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:47:45,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:45,863 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:45,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:46,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-05 21:47:46,078 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:46,079 INFO L82 PathProgramCache]: Analyzing trace with hash 133041116, now seen corresponding path program 10 times [2021-10-05 21:47:46,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:46,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341221784] [2021-10-05 21:47:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:46,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:47:46,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:46,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341221784] [2021-10-05 21:47:46,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341221784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:46,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097134540] [2021-10-05 21:47:46,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:47:46,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:46,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:46,272 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:46,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-05 21:47:46,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:47:46,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:46,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 21:47:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:47:47,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097134540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:47,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:47,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-05 21:47:47,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510177860] [2021-10-05 21:47:47,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:47:47,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:47:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:47:47,567 INFO L87 Difference]: Start difference. First operand 379 states and 1115 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:47,729 INFO L93 Difference]: Finished difference Result 515 states and 1467 transitions. [2021-10-05 21:47:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:47:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-05 21:47:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:47,733 INFO L225 Difference]: With dead ends: 515 [2021-10-05 21:47:47,734 INFO L226 Difference]: Without dead ends: 467 [2021-10-05 21:47:47,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:47:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-10-05 21:47:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 287. [2021-10-05 21:47:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1573426573426575) internal successors, (903), 286 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 903 transitions. [2021-10-05 21:47:47,748 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 903 transitions. Word has length 29 [2021-10-05 21:47:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:47,748 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 903 transitions. [2021-10-05 21:47:47,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:47,749 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 903 transitions. [2021-10-05 21:47:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-05 21:47:47,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:47,750 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:47,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:47,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-05 21:47:47,963 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:47,964 INFO L82 PathProgramCache]: Analyzing trace with hash 848853372, now seen corresponding path program 11 times [2021-10-05 21:47:47,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:47,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573466395] [2021-10-05 21:47:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:47,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-05 21:47:48,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:48,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573466395] [2021-10-05 21:47:48,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573466395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:48,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106759934] [2021-10-05 21:47:48,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:47:48,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:48,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:48,173 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:48,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-05 21:47:48,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 21:47:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 21:47:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:47:49,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106759934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:49,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:49,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-10-05 21:47:49,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771585385] [2021-10-05 21:47:49,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 21:47:49,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 21:47:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:47:49,888 INFO L87 Difference]: Start difference. First operand 287 states and 903 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:50,264 INFO L93 Difference]: Finished difference Result 418 states and 1176 transitions. [2021-10-05 21:47:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 21:47:50,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2021-10-05 21:47:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:50,268 INFO L225 Difference]: With dead ends: 418 [2021-10-05 21:47:50,268 INFO L226 Difference]: Without dead ends: 371 [2021-10-05 21:47:50,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:47:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-10-05 21:47:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 333. [2021-10-05 21:47:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0210843373493974) internal successors, (1003), 332 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1003 transitions. [2021-10-05 21:47:50,281 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1003 transitions. Word has length 29 [2021-10-05 21:47:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:50,281 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 1003 transitions. [2021-10-05 21:47:50,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1003 transitions. [2021-10-05 21:47:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-05 21:47:50,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:50,283 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:50,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:50,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-05 21:47:50,497 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:50,498 INFO L82 PathProgramCache]: Analyzing trace with hash 791925143, now seen corresponding path program 12 times [2021-10-05 21:47:50,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:50,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422266548] [2021-10-05 21:47:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:50,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:47:50,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:50,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422266548] [2021-10-05 21:47:50,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422266548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:50,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238230435] [2021-10-05 21:47:50,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:47:50,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:50,746 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:50,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-05 21:47:51,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 21:47:51,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:47:51,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 21:47:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:47:52,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238230435] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:52,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:47:52,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 21:47:52,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648314993] [2021-10-05 21:47:52,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:47:52,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:47:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:47:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:47:52,571 INFO L87 Difference]: Start difference. First operand 333 states and 1003 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-10-05 21:47:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:47:52,892 INFO L93 Difference]: Finished difference Result 407 states and 1146 transitions. [2021-10-05 21:47:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:47:52,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 30 [2021-10-05 21:47:52,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:47:52,895 INFO L225 Difference]: With dead ends: 407 [2021-10-05 21:47:52,895 INFO L226 Difference]: Without dead ends: 365 [2021-10-05 21:47:52,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:47:52,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-05 21:47:52,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 269. [2021-10-05 21:47:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 3.0522388059701493) internal successors, (818), 268 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:47:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 818 transitions. [2021-10-05 21:47:52,906 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 818 transitions. Word has length 30 [2021-10-05 21:47:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:47:52,906 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 818 transitions. [2021-10-05 21:47:52,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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) [2021-10-05 21:47:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 818 transitions. [2021-10-05 21:47:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-05 21:47:52,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:47:52,908 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:47:52,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-05 21:47:53,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-05 21:47:53,122 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:47:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:47:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash 277272999, now seen corresponding path program 1 times [2021-10-05 21:47:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:47:53,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537294977] [2021-10-05 21:47:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:53,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:47:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:47:53,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:47:53,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537294977] [2021-10-05 21:47:53,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537294977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:47:53,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749417719] [2021-10-05 21:47:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:47:53,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:47:53,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:47:53,903 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:47:53,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-05 21:47:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:47:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-05 21:47:54,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:47:54,821 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-05 21:47:54,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 703 treesize of output 725 [2021-10-05 21:47:55,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-05 21:47:56,629 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-05 21:47:56,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-05 21:47:57,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2021-10-05 21:47:59,678 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-05 21:47:59,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-05 21:47:59,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-05 21:47:59,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:48:00,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:48:00,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:48:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:48:01,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749417719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:01,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:01,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 28 [2021-10-05 21:48:01,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325387147] [2021-10-05 21:48:01,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 21:48:01,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 21:48:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:48:01,458 INFO L87 Difference]: Start difference. First operand 269 states and 818 transitions. Second operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:04,233 INFO L93 Difference]: Finished difference Result 1034 states and 3163 transitions. [2021-10-05 21:48:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 21:48:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-05 21:48:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:04,240 INFO L225 Difference]: With dead ends: 1034 [2021-10-05 21:48:04,240 INFO L226 Difference]: Without dead ends: 931 [2021-10-05 21:48:04,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2854.4ms TimeCoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2021-10-05 21:48:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-10-05 21:48:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 567. [2021-10-05 21:48:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.3374558303886928) internal successors, (1889), 566 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1889 transitions. [2021-10-05 21:48:04,267 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1889 transitions. Word has length 30 [2021-10-05 21:48:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:04,267 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1889 transitions. [2021-10-05 21:48:04,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1889 transitions. [2021-10-05 21:48:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-05 21:48:04,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:04,269 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:04,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:04,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-05 21:48:04,484 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -374370049, now seen corresponding path program 2 times [2021-10-05 21:48:04,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:04,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719848587] [2021-10-05 21:48:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:04,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:48:05,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:05,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719848587] [2021-10-05 21:48:05,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719848587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:05,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640556591] [2021-10-05 21:48:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:48:05,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:05,700 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:05,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-05 21:48:06,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:48:06,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:48:06,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:48:07,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640556591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:07,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:07,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-05 21:48:07,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691295990] [2021-10-05 21:48:07,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-05 21:48:07,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-05 21:48:07,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:48:07,977 INFO L87 Difference]: Start difference. First operand 567 states and 1889 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:09,246 INFO L93 Difference]: Finished difference Result 746 states and 2286 transitions. [2021-10-05 21:48:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 21:48:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-05 21:48:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:09,251 INFO L225 Difference]: With dead ends: 746 [2021-10-05 21:48:09,251 INFO L226 Difference]: Without dead ends: 725 [2021-10-05 21:48:09,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1618.3ms TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-10-05 21:48:09,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-10-05 21:48:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 575. [2021-10-05 21:48:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.346689895470383) internal successors, (1921), 574 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1921 transitions. [2021-10-05 21:48:09,271 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1921 transitions. Word has length 31 [2021-10-05 21:48:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:09,271 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1921 transitions. [2021-10-05 21:48:09,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1921 transitions. [2021-10-05 21:48:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-05 21:48:09,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:09,274 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:09,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-05 21:48:09,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:09,489 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:09,490 INFO L82 PathProgramCache]: Analyzing trace with hash 759852912, now seen corresponding path program 3 times [2021-10-05 21:48:09,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:09,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506309493] [2021-10-05 21:48:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:09,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:48:10,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:10,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506309493] [2021-10-05 21:48:10,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506309493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:10,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717185462] [2021-10-05 21:48:10,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:48:10,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:10,176 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:10,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-05 21:48:11,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 21:48:11,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 21:48:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:48:12,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717185462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:12,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:12,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-10-05 21:48:12,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747302040] [2021-10-05 21:48:12,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-05 21:48:12,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:12,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-05 21:48:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:48:12,693 INFO L87 Difference]: Start difference. First operand 575 states and 1921 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:14,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:14,140 INFO L93 Difference]: Finished difference Result 573 states and 1642 transitions. [2021-10-05 21:48:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-05 21:48:14,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-05 21:48:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:14,144 INFO L225 Difference]: With dead ends: 573 [2021-10-05 21:48:14,144 INFO L226 Difference]: Without dead ends: 403 [2021-10-05 21:48:14,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1662.8ms TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-10-05 21:48:14,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-05 21:48:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 323. [2021-10-05 21:48:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.3074534161490683) internal successors, (1065), 322 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1065 transitions. [2021-10-05 21:48:14,154 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1065 transitions. Word has length 31 [2021-10-05 21:48:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 1065 transitions. [2021-10-05 21:48:14,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1065 transitions. [2021-10-05 21:48:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-05 21:48:14,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:14,156 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:14,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:14,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:14,372 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash -65335875, now seen corresponding path program 4 times [2021-10-05 21:48:14,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:14,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816687161] [2021-10-05 21:48:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:14,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:48:14,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:14,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816687161] [2021-10-05 21:48:14,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816687161] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:14,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657852035] [2021-10-05 21:48:14,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:48:14,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:14,586 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:14,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-05 21:48:15,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:48:15,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:15,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 21:48:15,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:48:16,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657852035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:16,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:16,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:48:16,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813725359] [2021-10-05 21:48:16,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-05 21:48:16,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:16,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-05 21:48:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:48:16,600 INFO L87 Difference]: Start difference. First operand 323 states and 1065 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:16,699 INFO L93 Difference]: Finished difference Result 315 states and 986 transitions. [2021-10-05 21:48:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:48:16,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-05 21:48:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:16,704 INFO L225 Difference]: With dead ends: 315 [2021-10-05 21:48:16,704 INFO L226 Difference]: Without dead ends: 305 [2021-10-05 21:48:16,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-05 21:48:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-10-05 21:48:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-10-05 21:48:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.164473684210526) internal successors, (962), 304 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 962 transitions. [2021-10-05 21:48:16,714 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 962 transitions. Word has length 31 [2021-10-05 21:48:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:16,714 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 962 transitions. [2021-10-05 21:48:16,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 962 transitions. [2021-10-05 21:48:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-05 21:48:16,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:16,715 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:16,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-05 21:48:16,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-05 21:48:16,929 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1423441852, now seen corresponding path program 5 times [2021-10-05 21:48:16,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:16,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094134693] [2021-10-05 21:48:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:16,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 21:48:18,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:18,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094134693] [2021-10-05 21:48:18,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094134693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:18,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457429922] [2021-10-05 21:48:18,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:48:18,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:18,038 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:18,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-05 21:48:19,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 21:48:19,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-05 21:48:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:48:21,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457429922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:21,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:21,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 26 [2021-10-05 21:48:21,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517171176] [2021-10-05 21:48:21,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-05 21:48:21,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-05 21:48:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:48:21,436 INFO L87 Difference]: Start difference. First operand 305 states and 962 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:22,852 INFO L93 Difference]: Finished difference Result 802 states and 2423 transitions. [2021-10-05 21:48:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-05 21:48:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 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 [2021-10-05 21:48:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:22,857 INFO L225 Difference]: With dead ends: 802 [2021-10-05 21:48:22,857 INFO L226 Difference]: Without dead ends: 686 [2021-10-05 21:48:22,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1984.5ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-10-05 21:48:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-10-05 21:48:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 522. [2021-10-05 21:48:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.224568138195777) internal successors, (1680), 521 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1680 transitions. [2021-10-05 21:48:22,873 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1680 transitions. Word has length 32 [2021-10-05 21:48:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:22,873 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1680 transitions. [2021-10-05 21:48:22,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1680 transitions. [2021-10-05 21:48:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-05 21:48:22,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:22,876 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:22,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:23,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-05 21:48:23,091 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:23,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1277088847, now seen corresponding path program 6 times [2021-10-05 21:48:23,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:23,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139002691] [2021-10-05 21:48:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:23,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:48:24,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:24,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139002691] [2021-10-05 21:48:24,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139002691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:24,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982842189] [2021-10-05 21:48:24,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:48:24,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:24,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:24,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:24,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-05 21:48:25,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 21:48:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-05 21:48:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 21:48:28,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982842189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:28,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:28,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-05 21:48:28,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947221382] [2021-10-05 21:48:28,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 21:48:28,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:28,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 21:48:28,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:48:28,021 INFO L87 Difference]: Start difference. First operand 522 states and 1680 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:31,503 INFO L93 Difference]: Finished difference Result 689 states and 2051 transitions. [2021-10-05 21:48:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-05 21:48:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-05 21:48:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:31,509 INFO L225 Difference]: With dead ends: 689 [2021-10-05 21:48:31,509 INFO L226 Difference]: Without dead ends: 674 [2021-10-05 21:48:31,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 3597.4ms TimeCoverageRelationStatistics Valid=372, Invalid=2934, Unknown=0, NotChecked=0, Total=3306 [2021-10-05 21:48:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-10-05 21:48:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 532. [2021-10-05 21:48:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 3.2203389830508473) internal successors, (1710), 531 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1710 transitions. [2021-10-05 21:48:31,526 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1710 transitions. Word has length 33 [2021-10-05 21:48:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:31,526 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 1710 transitions. [2021-10-05 21:48:31,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1710 transitions. [2021-10-05 21:48:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 21:48:31,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:31,529 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:31,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:31,744 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2012969852, now seen corresponding path program 7 times [2021-10-05 21:48:31,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:31,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787296003] [2021-10-05 21:48:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:31,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:48:33,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:33,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787296003] [2021-10-05 21:48:33,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787296003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:33,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061018065] [2021-10-05 21:48:33,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:48:33,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:33,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:33,431 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:33,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-05 21:48:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:34,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 21:48:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:48:36,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061018065] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:36,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:36,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 29 [2021-10-05 21:48:36,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610610148] [2021-10-05 21:48:36,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-05 21:48:36,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:36,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-05 21:48:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-10-05 21:48:36,750 INFO L87 Difference]: Start difference. First operand 532 states and 1710 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-10-05 21:48:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:39,413 INFO L93 Difference]: Finished difference Result 780 states and 2313 transitions. [2021-10-05 21:48:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-05 21:48:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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 34 [2021-10-05 21:48:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:39,418 INFO L225 Difference]: With dead ends: 780 [2021-10-05 21:48:39,418 INFO L226 Difference]: Without dead ends: 758 [2021-10-05 21:48:39,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 3212.5ms TimeCoverageRelationStatistics Valid=326, Invalid=2754, Unknown=0, NotChecked=0, Total=3080 [2021-10-05 21:48:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-10-05 21:48:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 682. [2021-10-05 21:48:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.0558002936857562) internal successors, (2081), 681 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2081 transitions. [2021-10-05 21:48:39,440 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2081 transitions. Word has length 34 [2021-10-05 21:48:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:39,441 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2081 transitions. [2021-10-05 21:48:39,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 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) [2021-10-05 21:48:39,441 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2081 transitions. [2021-10-05 21:48:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 21:48:39,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:39,444 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:39,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:39,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-05 21:48:39,658 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:39,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2085483939, now seen corresponding path program 8 times [2021-10-05 21:48:39,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:39,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757954594] [2021-10-05 21:48:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:39,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:48:39,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:39,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757954594] [2021-10-05 21:48:39,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757954594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:39,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433279567] [2021-10-05 21:48:39,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:48:39,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:39,993 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:39,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-05 21:48:41,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:48:41,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:41,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 21:48:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 21:48:43,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433279567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:43,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:43,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-05 21:48:43,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446024504] [2021-10-05 21:48:43,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-05 21:48:43,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-05 21:48:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:48:43,366 INFO L87 Difference]: Start difference. First operand 682 states and 2081 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:43,782 INFO L93 Difference]: Finished difference Result 764 states and 2250 transitions. [2021-10-05 21:48:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:48:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 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 [2021-10-05 21:48:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:43,787 INFO L225 Difference]: With dead ends: 764 [2021-10-05 21:48:43,788 INFO L226 Difference]: Without dead ends: 756 [2021-10-05 21:48:43,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 774.0ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:48:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-10-05 21:48:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-10-05 21:48:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.013024602026049) internal successors, (2082), 691 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2082 transitions. [2021-10-05 21:48:43,808 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2082 transitions. Word has length 34 [2021-10-05 21:48:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:43,808 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2082 transitions. [2021-10-05 21:48:43,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2082 transitions. [2021-10-05 21:48:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-05 21:48:43,811 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:43,811 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:43,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:44,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:44,027 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:44,027 INFO L82 PathProgramCache]: Analyzing trace with hash 15789447, now seen corresponding path program 9 times [2021-10-05 21:48:44,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:44,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742484604] [2021-10-05 21:48:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:44,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:48:44,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:44,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742484604] [2021-10-05 21:48:44,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742484604] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:44,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813448426] [2021-10-05 21:48:44,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:48:44,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:44,196 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:44,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-05 21:48:45,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 21:48:45,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:45,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-05 21:48:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-05 21:48:46,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813448426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:46,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-05 21:48:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021883813] [2021-10-05 21:48:46,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:48:46,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:46,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:48:46,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:48:46,914 INFO L87 Difference]: Start difference. First operand 692 states and 2082 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) [2021-10-05 21:48:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:47,718 INFO L93 Difference]: Finished difference Result 570 states and 1318 transitions. [2021-10-05 21:48:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-05 21:48:47,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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 34 [2021-10-05 21:48:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:47,722 INFO L225 Difference]: With dead ends: 570 [2021-10-05 21:48:47,722 INFO L226 Difference]: Without dead ends: 451 [2021-10-05 21:48:47,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-10-05 21:48:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-05 21:48:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 435. [2021-10-05 21:48:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.511520737327189) internal successors, (1090), 434 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1090 transitions. [2021-10-05 21:48:47,735 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1090 transitions. Word has length 34 [2021-10-05 21:48:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:47,735 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1090 transitions. [2021-10-05 21:48:47,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 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) [2021-10-05 21:48:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1090 transitions. [2021-10-05 21:48:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:48:47,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:47,737 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:47,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-05 21:48:47,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:47,942 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1321685228, now seen corresponding path program 10 times [2021-10-05 21:48:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:47,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892016256] [2021-10-05 21:48:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:47,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-05 21:48:48,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:48,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892016256] [2021-10-05 21:48:48,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892016256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:48,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977547284] [2021-10-05 21:48:48,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:48:48,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:48,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:48,253 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:48,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-05 21:48:49,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:48:49,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 21:48:49,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:48:50,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977547284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:50,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:48:50,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-05 21:48:50,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280081604] [2021-10-05 21:48:50,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 21:48:50,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:48:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 21:48:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:48:50,356 INFO L87 Difference]: Start difference. First operand 435 states and 1090 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:48:50,954 INFO L93 Difference]: Finished difference Result 1299 states and 4159 transitions. [2021-10-05 21:48:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 21:48:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:48:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:48:50,963 INFO L225 Difference]: With dead ends: 1299 [2021-10-05 21:48:50,963 INFO L226 Difference]: Without dead ends: 1239 [2021-10-05 21:48:50,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 21:48:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-10-05 21:48:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 516. [2021-10-05 21:48:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.479611650485437) internal successors, (1792), 515 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1792 transitions. [2021-10-05 21:48:51,017 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1792 transitions. Word has length 35 [2021-10-05 21:48:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:48:51,018 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1792 transitions. [2021-10-05 21:48:51,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:48:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1792 transitions. [2021-10-05 21:48:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:48:51,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:48:51,021 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:48:51,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-05 21:48:51,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-05 21:48:51,233 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:48:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:48:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1518198733, now seen corresponding path program 11 times [2021-10-05 21:48:51,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:48:51,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061391573] [2021-10-05 21:48:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:48:51,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:48:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:48:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:48:52,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:48:52,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061391573] [2021-10-05 21:48:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061391573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:48:52,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357397625] [2021-10-05 21:48:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:48:52,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:48:52,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:48:52,400 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:48:52,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-05 21:48:53,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 21:48:53,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:48:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-05 21:48:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:48:54,069 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-10-05 21:48:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 108 [2021-10-05 21:48:55,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-05 21:48:56,572 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-05 21:48:56,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-05 21:48:58,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-05 21:48:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2021-10-05 21:49:00,497 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-05 21:49:00,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-05 21:49:00,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-05 21:49:00,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:49:01,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:49:01,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-05 21:49:04,129 INFO L354 Elim1Store]: treesize reduction 255, result has 41.4 percent of original size [2021-10-05 21:49:04,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 194 treesize of output 247 [2021-10-05 21:49:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 21:49:04,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357397625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:04,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:04,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 41 [2021-10-05 21:49:04,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094577927] [2021-10-05 21:49:04,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-05 21:49:04,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-05 21:49:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-10-05 21:49:04,219 INFO L87 Difference]: Start difference. First operand 516 states and 1792 transitions. Second operand has 43 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:07,872 INFO L93 Difference]: Finished difference Result 1196 states and 4170 transitions. [2021-10-05 21:49:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-05 21:49:07,873 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:49:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:07,882 INFO L225 Difference]: With dead ends: 1196 [2021-10-05 21:49:07,882 INFO L226 Difference]: Without dead ends: 1178 [2021-10-05 21:49:07,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 4568.1ms TimeCoverageRelationStatistics Valid=288, Invalid=3494, Unknown=0, NotChecked=0, Total=3782 [2021-10-05 21:49:07,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-10-05 21:49:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 809. [2021-10-05 21:49:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.74009900990099) internal successors, (3022), 808 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 3022 transitions. [2021-10-05 21:49:07,910 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 3022 transitions. Word has length 35 [2021-10-05 21:49:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:07,911 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 3022 transitions. [2021-10-05 21:49:07,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 42 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 3022 transitions. [2021-10-05 21:49:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:49:07,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:07,916 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:07,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-05 21:49:08,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-05 21:49:08,128 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1316279678, now seen corresponding path program 12 times [2021-10-05 21:49:08,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:08,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227164504] [2021-10-05 21:49:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:08,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 21:49:09,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:09,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227164504] [2021-10-05 21:49:09,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227164504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:09,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839058908] [2021-10-05 21:49:09,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:49:09,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:09,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:09,102 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:09,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-05 21:49:10,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 21:49:10,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:49:10,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-05 21:49:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-05 21:49:12,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839058908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:12,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:12,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-10-05 21:49:12,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105123241] [2021-10-05 21:49:12,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-05 21:49:12,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-05 21:49:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-10-05 21:49:12,619 INFO L87 Difference]: Start difference. First operand 809 states and 3022 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:14,502 INFO L93 Difference]: Finished difference Result 968 states and 3333 transitions. [2021-10-05 21:49:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 21:49:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-05 21:49:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:14,516 INFO L225 Difference]: With dead ends: 968 [2021-10-05 21:49:14,516 INFO L226 Difference]: Without dead ends: 894 [2021-10-05 21:49:14,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2216.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-10-05 21:49:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-10-05 21:49:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 758. [2021-10-05 21:49:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.8612945838837516) internal successors, (2923), 757 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2923 transitions. [2021-10-05 21:49:14,534 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2923 transitions. Word has length 35 [2021-10-05 21:49:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:14,535 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2923 transitions. [2021-10-05 21:49:14,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2923 transitions. [2021-10-05 21:49:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-05 21:49:14,538 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:14,538 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:14,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-05 21:49:14,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-05 21:49:14,752 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash 499005663, now seen corresponding path program 13 times [2021-10-05 21:49:14,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:14,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049748386] [2021-10-05 21:49:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:14,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:49:17,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:17,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049748386] [2021-10-05 21:49:17,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049748386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:17,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734194330] [2021-10-05 21:49:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:49:17,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:17,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:17,236 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-05 21:49:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-05 21:49:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:49:21,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734194330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:21,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:21,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2021-10-05 21:49:21,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602472979] [2021-10-05 21:49:21,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-05 21:49:21,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-05 21:49:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-10-05 21:49:21,391 INFO L87 Difference]: Start difference. First operand 758 states and 2923 transitions. Second operand has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2021-10-05 21:49:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:24,660 INFO L93 Difference]: Finished difference Result 945 states and 3287 transitions. [2021-10-05 21:49:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-05 21:49:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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 35 [2021-10-05 21:49:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:24,669 INFO L225 Difference]: With dead ends: 945 [2021-10-05 21:49:24,669 INFO L226 Difference]: Without dead ends: 884 [2021-10-05 21:49:24,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 4087.4ms TimeCoverageRelationStatistics Valid=487, Invalid=3419, Unknown=0, NotChecked=0, Total=3906 [2021-10-05 21:49:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-10-05 21:49:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 770. [2021-10-05 21:49:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.811443433029909) internal successors, (2931), 769 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2931 transitions. [2021-10-05 21:49:24,695 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2931 transitions. Word has length 35 [2021-10-05 21:49:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:24,695 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 2931 transitions. [2021-10-05 21:49:24,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 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) [2021-10-05 21:49:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2931 transitions. [2021-10-05 21:49:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 21:49:24,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:24,700 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:24,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-05 21:49:24,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:24,907 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:24,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash 576602075, now seen corresponding path program 14 times [2021-10-05 21:49:24,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:24,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310715253] [2021-10-05 21:49:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:24,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:49:26,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:26,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310715253] [2021-10-05 21:49:26,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310715253] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:26,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875955208] [2021-10-05 21:49:26,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:49:26,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:26,642 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:26,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-05 21:49:28,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:49:28,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:49:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-05 21:49:28,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 21:49:31,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875955208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:31,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:31,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2021-10-05 21:49:31,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916776080] [2021-10-05 21:49:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-05 21:49:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-05 21:49:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-10-05 21:49:31,057 INFO L87 Difference]: Start difference. First operand 770 states and 2931 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:34,449 INFO L93 Difference]: Finished difference Result 1020 states and 3463 transitions. [2021-10-05 21:49:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-05 21:49:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 21:49:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:34,453 INFO L225 Difference]: With dead ends: 1020 [2021-10-05 21:49:34,453 INFO L226 Difference]: Without dead ends: 1013 [2021-10-05 21:49:34,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3443.5ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-10-05 21:49:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-10-05 21:49:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 784. [2021-10-05 21:49:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.8212005108556832) internal successors, (2992), 783 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2992 transitions. [2021-10-05 21:49:34,475 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2992 transitions. Word has length 36 [2021-10-05 21:49:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:34,475 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2992 transitions. [2021-10-05 21:49:34,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2992 transitions. [2021-10-05 21:49:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 21:49:34,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:34,479 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:34,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-05 21:49:34,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:34,695 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1131317573, now seen corresponding path program 15 times [2021-10-05 21:49:34,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:34,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339454726] [2021-10-05 21:49:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:34,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:49:35,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:35,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339454726] [2021-10-05 21:49:35,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339454726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:35,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711021219] [2021-10-05 21:49:35,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:49:35,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:35,030 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:35,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-05 21:49:36,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 21:49:36,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:49:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-05 21:49:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:49:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711021219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:37,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:37,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-10-05 21:49:37,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442499780] [2021-10-05 21:49:37,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:49:37,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:49:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:49:37,637 INFO L87 Difference]: Start difference. First operand 784 states and 2992 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:37,908 INFO L93 Difference]: Finished difference Result 816 states and 2774 transitions. [2021-10-05 21:49:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:49:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 21:49:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:37,911 INFO L225 Difference]: With dead ends: 816 [2021-10-05 21:49:37,912 INFO L226 Difference]: Without dead ends: 810 [2021-10-05 21:49:37,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:49:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-10-05 21:49:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 625. [2021-10-05 21:49:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.5705128205128207) internal successors, (2228), 624 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2228 transitions. [2021-10-05 21:49:37,929 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2228 transitions. Word has length 36 [2021-10-05 21:49:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:37,930 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 2228 transitions. [2021-10-05 21:49:37,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2228 transitions. [2021-10-05 21:49:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 21:49:37,932 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:37,933 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:37,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-05 21:49:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:38,149 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash 934804068, now seen corresponding path program 16 times [2021-10-05 21:49:38,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:38,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736561767] [2021-10-05 21:49:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:38,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-05 21:49:38,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:38,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736561767] [2021-10-05 21:49:38,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736561767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:38,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766737899] [2021-10-05 21:49:38,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:49:38,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:38,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:38,338 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:38,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-05 21:49:40,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:49:40,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:49:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-05 21:49:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-05 21:49:41,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766737899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:41,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:41,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-10-05 21:49:41,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758436750] [2021-10-05 21:49:41,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 21:49:41,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 21:49:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:49:41,592 INFO L87 Difference]: Start difference. First operand 625 states and 2228 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:41,990 INFO L93 Difference]: Finished difference Result 543 states and 1498 transitions. [2021-10-05 21:49:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:49:41,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 21:49:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:41,993 INFO L225 Difference]: With dead ends: 543 [2021-10-05 21:49:41,993 INFO L226 Difference]: Without dead ends: 527 [2021-10-05 21:49:41,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:49:41,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-10-05 21:49:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 375. [2021-10-05 21:49:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.7620320855614975) internal successors, (1033), 374 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1033 transitions. [2021-10-05 21:49:42,010 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1033 transitions. Word has length 36 [2021-10-05 21:49:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:42,010 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 1033 transitions. [2021-10-05 21:49:42,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1033 transitions. [2021-10-05 21:49:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 21:49:42,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:42,012 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:42,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-05 21:49:42,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:42,228 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:42,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2049072990, now seen corresponding path program 17 times [2021-10-05 21:49:42,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:42,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99199533] [2021-10-05 21:49:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:42,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:49:42,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:42,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99199533] [2021-10-05 21:49:42,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99199533] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:42,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890732528] [2021-10-05 21:49:42,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:49:42,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:42,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:42,668 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:42,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-05 21:49:44,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-05 21:49:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:49:44,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-05 21:49:44,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-05 21:49:45,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890732528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:45,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:45,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-10-05 21:49:45,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622664155] [2021-10-05 21:49:45,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 21:49:45,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:45,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 21:49:45,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:49:45,323 INFO L87 Difference]: Start difference. First operand 375 states and 1033 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2021-10-05 21:49:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:46,143 INFO L93 Difference]: Finished difference Result 359 states and 874 transitions. [2021-10-05 21:49:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:49:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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 36 [2021-10-05 21:49:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:46,146 INFO L225 Difference]: With dead ends: 359 [2021-10-05 21:49:46,146 INFO L226 Difference]: Without dead ends: 320 [2021-10-05 21:49:46,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 853.3ms TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 21:49:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-05 21:49:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 286. [2021-10-05 21:49:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6070175438596492) internal successors, (743), 285 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 743 transitions. [2021-10-05 21:49:46,154 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 743 transitions. Word has length 36 [2021-10-05 21:49:46,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:46,154 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 743 transitions. [2021-10-05 21:49:46,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 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) [2021-10-05 21:49:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 743 transitions. [2021-10-05 21:49:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-05 21:49:46,155 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:46,155 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:46,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-05 21:49:46,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:46,358 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:46,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1199126314, now seen corresponding path program 18 times [2021-10-05 21:49:46,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:46,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322315953] [2021-10-05 21:49:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:46,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:49:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:49:49,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:49:49,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322315953] [2021-10-05 21:49:49,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322315953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:49,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738083374] [2021-10-05 21:49:49,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:49:49,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:49:49,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:49:49,335 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:49:49,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-05 21:49:51,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-05 21:49:51,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:49:51,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-05 21:49:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:49:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:49:54,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738083374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:49:54,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:49:54,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 34 [2021-10-05 21:49:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154626964] [2021-10-05 21:49:54,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-05 21:49:54,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:49:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-05 21:49:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-10-05 21:49:54,117 INFO L87 Difference]: Start difference. First operand 286 states and 743 transitions. Second operand has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:49:58,019 INFO L93 Difference]: Finished difference Result 782 states and 1976 transitions. [2021-10-05 21:49:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-05 21:49:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-05 21:49:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:49:58,022 INFO L225 Difference]: With dead ends: 782 [2021-10-05 21:49:58,022 INFO L226 Difference]: Without dead ends: 692 [2021-10-05 21:49:58,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 4993.6ms TimeCoverageRelationStatistics Valid=330, Invalid=3576, Unknown=0, NotChecked=0, Total=3906 [2021-10-05 21:49:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-10-05 21:49:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 438. [2021-10-05 21:49:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.7437070938215102) internal successors, (1199), 437 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1199 transitions. [2021-10-05 21:49:58,033 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1199 transitions. Word has length 36 [2021-10-05 21:49:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:49:58,033 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1199 transitions. [2021-10-05 21:49:58,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:49:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1199 transitions. [2021-10-05 21:49:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:49:58,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:49:58,035 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:49:58,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-05 21:49:58,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-05 21:49:58,250 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:49:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:49:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash -684810706, now seen corresponding path program 19 times [2021-10-05 21:49:58,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:49:58,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023987433] [2021-10-05 21:49:58,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:49:58,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:49:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:50:01,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:01,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023987433] [2021-10-05 21:50:01,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023987433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:01,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895957319] [2021-10-05 21:50:01,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:50:01,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:01,862 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:01,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-05 21:50:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:03,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 21:50:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-05 21:50:06,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895957319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:06,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:06,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 30 [2021-10-05 21:50:06,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034700287] [2021-10-05 21:50:06,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-05 21:50:06,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-05 21:50:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-10-05 21:50:06,033 INFO L87 Difference]: Start difference. First operand 438 states and 1199 transitions. Second operand has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:10,399 INFO L93 Difference]: Finished difference Result 670 states and 1624 transitions. [2021-10-05 21:50:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-05 21:50:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2021-10-05 21:50:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:10,402 INFO L225 Difference]: With dead ends: 670 [2021-10-05 21:50:10,403 INFO L226 Difference]: Without dead ends: 588 [2021-10-05 21:50:10,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 5285.9ms TimeCoverageRelationStatistics Valid=352, Invalid=3308, Unknown=0, NotChecked=0, Total=3660 [2021-10-05 21:50:10,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-10-05 21:50:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 424. [2021-10-05 21:50:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.7257683215130024) internal successors, (1153), 423 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1153 transitions. [2021-10-05 21:50:10,412 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1153 transitions. Word has length 37 [2021-10-05 21:50:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:10,413 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1153 transitions. [2021-10-05 21:50:10,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1153 transitions. [2021-10-05 21:50:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:50:10,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:10,414 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:10,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:10,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-05 21:50:10,630 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:50:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1692972943, now seen corresponding path program 20 times [2021-10-05 21:50:10,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:10,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202671280] [2021-10-05 21:50:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:10,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:50:11,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:11,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202671280] [2021-10-05 21:50:11,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202671280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:11,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501508888] [2021-10-05 21:50:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:50:11,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:11,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:11,806 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:11,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-05 21:50:13,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:50:13,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-05 21:50:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:50:16,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501508888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:16,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:16,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2021-10-05 21:50:16,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396121616] [2021-10-05 21:50:16,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-05 21:50:16,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-05 21:50:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 21:50:16,730 INFO L87 Difference]: Start difference. First operand 424 states and 1153 transitions. Second operand has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:17,785 INFO L93 Difference]: Finished difference Result 503 states and 1386 transitions. [2021-10-05 21:50:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 21:50:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 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 [2021-10-05 21:50:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:17,788 INFO L225 Difference]: With dead ends: 503 [2021-10-05 21:50:17,788 INFO L226 Difference]: Without dead ends: 490 [2021-10-05 21:50:17,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1799.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2021-10-05 21:50:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-10-05 21:50:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 446. [2021-10-05 21:50:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.7707865168539327) internal successors, (1233), 445 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1233 transitions. [2021-10-05 21:50:17,796 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1233 transitions. Word has length 37 [2021-10-05 21:50:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:17,796 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1233 transitions. [2021-10-05 21:50:17,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1233 transitions. [2021-10-05 21:50:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:50:17,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:17,798 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:17,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:17,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:17,999 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:50:17,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:18,000 INFO L82 PathProgramCache]: Analyzing trace with hash -381882705, now seen corresponding path program 21 times [2021-10-05 21:50:18,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:18,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617627550] [2021-10-05 21:50:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:18,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 21:50:18,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:18,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617627550] [2021-10-05 21:50:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617627550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:18,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937945800] [2021-10-05 21:50:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:50:18,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:18,487 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:18,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-05 21:50:20,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-05 21:50:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-05 21:50:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-05 21:50:22,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937945800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:22,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:22,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-05 21:50:22,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322383457] [2021-10-05 21:50:22,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-05 21:50:22,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:22,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-05 21:50:22,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:50:22,737 INFO L87 Difference]: Start difference. First operand 446 states and 1233 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:24,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:24,125 INFO L93 Difference]: Finished difference Result 842 states and 2317 transitions. [2021-10-05 21:50:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 21:50:24,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2021-10-05 21:50:24,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:24,129 INFO L225 Difference]: With dead ends: 842 [2021-10-05 21:50:24,129 INFO L226 Difference]: Without dead ends: 776 [2021-10-05 21:50:24,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1358.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 21:50:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-10-05 21:50:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 498. [2021-10-05 21:50:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.8832997987927564) internal successors, (1433), 497 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1433 transitions. [2021-10-05 21:50:24,142 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1433 transitions. Word has length 37 [2021-10-05 21:50:24,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:24,143 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1433 transitions. [2021-10-05 21:50:24,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1433 transitions. [2021-10-05 21:50:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-05 21:50:24,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:24,145 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:24,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:24,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-05 21:50:24,359 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:50:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1368167136, now seen corresponding path program 22 times [2021-10-05 21:50:24,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:24,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481026809] [2021-10-05 21:50:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:24,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:50:24,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:24,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481026809] [2021-10-05 21:50:24,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481026809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:24,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011442685] [2021-10-05 21:50:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:50:24,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:24,720 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:24,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-05 21:50:26,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:50:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 21:50:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-05 21:50:29,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011442685] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:29,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:29,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-10-05 21:50:29,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579887814] [2021-10-05 21:50:29,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 21:50:29,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 21:50:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:50:29,059 INFO L87 Difference]: Start difference. First operand 498 states and 1433 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-10-05 21:50:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:29,848 INFO L93 Difference]: Finished difference Result 1042 states and 2732 transitions. [2021-10-05 21:50:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:50:29,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 37 [2021-10-05 21:50:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:29,852 INFO L225 Difference]: With dead ends: 1042 [2021-10-05 21:50:29,852 INFO L226 Difference]: Without dead ends: 854 [2021-10-05 21:50:29,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 856.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:50:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-10-05 21:50:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 337. [2021-10-05 21:50:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.267857142857143) internal successors, (1098), 336 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:29,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1098 transitions. [2021-10-05 21:50:29,864 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1098 transitions. Word has length 37 [2021-10-05 21:50:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:29,865 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1098 transitions. [2021-10-05 21:50:29,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-10-05 21:50:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1098 transitions. [2021-10-05 21:50:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-05 21:50:29,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:29,867 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:29,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-05 21:50:30,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:30,074 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:50:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash -188229146, now seen corresponding path program 23 times [2021-10-05 21:50:30,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:30,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801203618] [2021-10-05 21:50:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:30,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 21:50:30,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:30,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801203618] [2021-10-05 21:50:30,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801203618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:30,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928050490] [2021-10-05 21:50:30,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:50:30,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:30,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:30,553 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:30,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-05 21:50:32,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-05 21:50:32,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:32,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:50:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:50:35,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928050490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:35,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:35,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2021-10-05 21:50:35,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393862125] [2021-10-05 21:50:35,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-05 21:50:35,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-05 21:50:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:50:35,868 INFO L87 Difference]: Start difference. First operand 337 states and 1098 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:36,379 INFO L93 Difference]: Finished difference Result 343 states and 1099 transitions. [2021-10-05 21:50:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:50:36,380 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-05 21:50:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:36,382 INFO L225 Difference]: With dead ends: 343 [2021-10-05 21:50:36,382 INFO L226 Difference]: Without dead ends: 309 [2021-10-05 21:50:36,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1209.0ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 21:50:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-10-05 21:50:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-10-05 21:50:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.272727272727273) internal successors, (1008), 308 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 1008 transitions. [2021-10-05 21:50:36,389 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 1008 transitions. Word has length 38 [2021-10-05 21:50:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 1008 transitions. [2021-10-05 21:50:36,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 1008 transitions. [2021-10-05 21:50:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-05 21:50:36,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:36,391 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:36,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-05 21:50:36,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:36,598 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:50:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:36,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1386352749, now seen corresponding path program 24 times [2021-10-05 21:50:36,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:36,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617911537] [2021-10-05 21:50:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:36,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 21:50:37,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:37,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617911537] [2021-10-05 21:50:37,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617911537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:37,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888379191] [2021-10-05 21:50:37,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:50:37,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:37,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:37,048 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:37,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-05 21:50:39,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-05 21:50:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:50:39,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:50:39,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-05 21:50:42,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888379191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:42,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:42,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-05 21:50:42,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597272991] [2021-10-05 21:50:42,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-05 21:50:42,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-05 21:50:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:50:42,327 INFO L87 Difference]: Start difference. First operand 309 states and 1008 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:50:44,335 INFO L93 Difference]: Finished difference Result 414 states and 1192 transitions. [2021-10-05 21:50:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-05 21:50:44,336 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-05 21:50:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:50:44,337 INFO L225 Difference]: With dead ends: 414 [2021-10-05 21:50:44,337 INFO L226 Difference]: Without dead ends: 316 [2021-10-05 21:50:44,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2464.6ms TimeCoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2021-10-05 21:50:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-05 21:50:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-10-05 21:50:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.2444444444444445) internal successors, (1022), 315 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1022 transitions. [2021-10-05 21:50:44,344 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1022 transitions. Word has length 39 [2021-10-05 21:50:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:50:44,344 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 1022 transitions. [2021-10-05 21:50:44,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:50:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1022 transitions. [2021-10-05 21:50:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-05 21:50:44,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:50:44,345 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:50:44,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-05 21:50:44,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-05 21:50:44,546 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:50:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:50:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash 12377374, now seen corresponding path program 25 times [2021-10-05 21:50:44,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:50:44,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462714155] [2021-10-05 21:50:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:50:44,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:50:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:50:47,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:50:47,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462714155] [2021-10-05 21:50:47,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462714155] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:47,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266035537] [2021-10-05 21:50:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:50:47,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:50:47,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:50:47,396 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:50:47,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-05 21:50:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:50:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-05 21:50:49,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:50:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-05 21:50:55,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266035537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:50:55,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:50:55,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 49 [2021-10-05 21:50:55,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518701602] [2021-10-05 21:50:55,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-05 21:50:55,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:50:55,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-05 21:50:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2388, Unknown=0, NotChecked=0, Total=2550 [2021-10-05 21:50:55,099 INFO L87 Difference]: Start difference. First operand 316 states and 1022 transitions. Second operand has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:01,835 INFO L93 Difference]: Finished difference Result 596 states and 1569 transitions. [2021-10-05 21:51:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-05 21:51:01,836 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-05 21:51:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:01,841 INFO L225 Difference]: With dead ends: 596 [2021-10-05 21:51:01,841 INFO L226 Difference]: Without dead ends: 335 [2021-10-05 21:51:01,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 8790.1ms TimeCoverageRelationStatistics Valid=520, Invalid=7312, Unknown=0, NotChecked=0, Total=7832 [2021-10-05 21:51:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-10-05 21:51:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 318. [2021-10-05 21:51:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.230283911671924) internal successors, (1024), 317 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1024 transitions. [2021-10-05 21:51:01,852 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1024 transitions. Word has length 41 [2021-10-05 21:51:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1024 transitions. [2021-10-05 21:51:01,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1024 transitions. [2021-10-05 21:51:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-05 21:51:01,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:01,854 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:01,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-05 21:51:02,069 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:51:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1223772933, now seen corresponding path program 26 times [2021-10-05 21:51:02,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:02,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060016787] [2021-10-05 21:51:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:02,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-05 21:51:04,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:04,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060016787] [2021-10-05 21:51:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060016787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:04,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363396364] [2021-10-05 21:51:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:51:04,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:04,173 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:04,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-05 21:51:06,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:51:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-05 21:51:06,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:51:11,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363396364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:11,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:11,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 46 [2021-10-05 21:51:11,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450847870] [2021-10-05 21:51:11,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-05 21:51:11,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-05 21:51:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2074, Unknown=0, NotChecked=0, Total=2256 [2021-10-05 21:51:11,763 INFO L87 Difference]: Start difference. First operand 318 states and 1024 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:16,128 INFO L93 Difference]: Finished difference Result 504 states and 1374 transitions. [2021-10-05 21:51:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-05 21:51:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2021-10-05 21:51:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:16,129 INFO L225 Difference]: With dead ends: 504 [2021-10-05 21:51:16,130 INFO L226 Difference]: Without dead ends: 319 [2021-10-05 21:51:16,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 5993.2ms TimeCoverageRelationStatistics Valid=471, Invalid=5079, Unknown=0, NotChecked=0, Total=5550 [2021-10-05 21:51:16,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-05 21:51:16,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-10-05 21:51:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.2232704402515724) internal successors, (1025), 318 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 1025 transitions. [2021-10-05 21:51:16,136 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 1025 transitions. Word has length 42 [2021-10-05 21:51:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:16,136 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 1025 transitions. [2021-10-05 21:51:16,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 1025 transitions. [2021-10-05 21:51:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-05 21:51:16,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:16,137 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:16,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-05 21:51:16,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-05 21:51:16,338 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:51:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:16,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1159255981, now seen corresponding path program 27 times [2021-10-05 21:51:16,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:16,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186878210] [2021-10-05 21:51:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:16,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:51:17,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:17,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186878210] [2021-10-05 21:51:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186878210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:17,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538995406] [2021-10-05 21:51:17,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:51:17,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:17,982 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:17,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-05 21:51:20,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-05 21:51:20,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-05 21:51:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-05 21:51:26,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538995406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:26,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:26,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 46 [2021-10-05 21:51:26,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041332181] [2021-10-05 21:51:26,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-05 21:51:26,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:26,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-05 21:51:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2094, Unknown=0, NotChecked=0, Total=2256 [2021-10-05 21:51:26,344 INFO L87 Difference]: Start difference. First operand 319 states and 1025 transitions. Second operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:29,005 INFO L93 Difference]: Finished difference Result 562 states and 1515 transitions. [2021-10-05 21:51:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-05 21:51:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-05 21:51:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:29,007 INFO L225 Difference]: With dead ends: 562 [2021-10-05 21:51:29,007 INFO L226 Difference]: Without dead ends: 320 [2021-10-05 21:51:29,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 4706.8ms TimeCoverageRelationStatistics Valid=312, Invalid=3720, Unknown=0, NotChecked=0, Total=4032 [2021-10-05 21:51:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-10-05 21:51:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-10-05 21:51:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.2163009404388716) internal successors, (1026), 319 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 1026 transitions. [2021-10-05 21:51:29,016 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 1026 transitions. Word has length 43 [2021-10-05 21:51:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:29,016 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 1026 transitions. [2021-10-05 21:51:29,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:29,017 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 1026 transitions. [2021-10-05 21:51:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-05 21:51:29,018 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:51:29,018 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:51:29,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:29,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:29,232 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-05 21:51:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:51:29,232 INFO L82 PathProgramCache]: Analyzing trace with hash 840769531, now seen corresponding path program 28 times [2021-10-05 21:51:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:51:29,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796227363] [2021-10-05 21:51:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:51:29,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:51:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:51:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-05 21:51:31,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:51:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796227363] [2021-10-05 21:51:31,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796227363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:31,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710845185] [2021-10-05 21:51:31,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:51:31,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:51:31,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:51:31,362 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:51:31,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-05 21:51:34,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:51:34,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:51:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-05 21:51:34,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:51:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-05 21:51:38,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710845185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:51:38,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:51:38,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 42 [2021-10-05 21:51:38,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381995633] [2021-10-05 21:51:38,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-05 21:51:38,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:51:38,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-05 21:51:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2021-10-05 21:51:38,817 INFO L87 Difference]: Start difference. First operand 320 states and 1026 transitions. Second operand has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:51:43,509 INFO L93 Difference]: Finished difference Result 319 states and 587 transitions. [2021-10-05 21:51:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-05 21:51:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-05 21:51:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:51:43,510 INFO L225 Difference]: With dead ends: 319 [2021-10-05 21:51:43,510 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 21:51:43,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 5973.6ms TimeCoverageRelationStatistics Valid=407, Invalid=5293, Unknown=0, NotChecked=0, Total=5700 [2021-10-05 21:51:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 21:51:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 21:51:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 21:51:43,513 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-10-05 21:51:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:51:43,513 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 21:51:43,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:51:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 21:51:43,514 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 21:51:43,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 21:51:43,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 21:51:43,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 21:51:43,518 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-05 21:51:43,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-05 21:51:43,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-05 21:51:43,726 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 21:51:43,726 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 21:51:43,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 09:51:43 BasicIcfg [2021-10-05 21:51:43,728 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 21:51:43,729 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 21:51:43,729 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 21:51:43,729 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 21:51:43,730 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:46:43" (3/4) ... [2021-10-05 21:51:43,733 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 21:51:43,740 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 21:51:43,740 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 21:51:43,740 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-05 21:51:43,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 22 nodes and edges [2021-10-05 21:51:43,751 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-05 21:51:43,752 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:51:43,752 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 21:51:43,808 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 21:51:43,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 21:51:43,809 INFO L168 Benchmark]: Toolchain (without parser) took 302223.82 ms. Allocated memory was 54.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 30.2 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 394.0 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,810 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 21.1 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:51:43,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 427.36 ms. Allocated memory is still 54.5 MB. Free memory was 29.8 MB in the beginning and 31.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,810 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.44 ms. Allocated memory is still 54.5 MB. Free memory was 31.0 MB in the beginning and 28.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,811 INFO L168 Benchmark]: Boogie Preprocessor took 57.36 ms. Allocated memory is still 54.5 MB. Free memory was 28.4 MB in the beginning and 26.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,811 INFO L168 Benchmark]: RCFGBuilder took 1293.51 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 26.4 MB in the beginning and 37.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,812 INFO L168 Benchmark]: TraceAbstraction took 300295.62 ms. Allocated memory was 67.1 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 36.8 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 381.8 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,812 INFO L168 Benchmark]: Witness Printer took 79.37 ms. Allocated memory is still 1.6 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-05 21:51:43,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 21.1 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 427.36 ms. Allocated memory is still 54.5 MB. Free memory was 29.8 MB in the beginning and 31.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.44 ms. Allocated memory is still 54.5 MB. Free memory was 31.0 MB in the beginning and 28.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.36 ms. Allocated memory is still 54.5 MB. Free memory was 28.4 MB in the beginning and 26.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1293.51 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 26.4 MB in the beginning and 37.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 300295.62 ms. Allocated memory was 67.1 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 36.8 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 381.8 MB. Max. memory is 16.1 GB. * Witness Printer took 79.37 ms. Allocated memory is still 1.6 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11344.3ms, 211 PlacesBefore, 33 PlacesAfterwards, 225 TransitionsBefore, 29 TransitionsAfterwards, 2196 CoEnabledTransitionPairs, 7 FixpointIterations, 148 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 17 TrivialYvCompositions, 5 ConcurrentYvCompositions, 18 ChoiceCompositions, 236 TotalNumberOfCompositions, 2142 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1988, positive: 1960, positive conditional: 0, positive unconditional: 1960, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1314, positive: 1306, positive conditional: 0, positive unconditional: 1306, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1314, positive: 1306, positive conditional: 0, positive unconditional: 1306, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 40, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1988, positive: 654, positive conditional: 0, positive unconditional: 654, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1314, unknown conditional: 0, unknown unconditional: 1314] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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: 153]: 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, 236 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 300144.2ms, OverallIterations: 56, TraceHistogramMax: 7, EmptinessCheckTime: 99.0ms, AutomataDifference: 73640.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11399.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1638 SDtfs, 6757 SDslu, 18049 SDs, 0 SdLazy, 26274 SolverSat, 2332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23121.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2757 GetRequests, 1072 SyntacticMatches, 1 SemanticMatches, 1684 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14262 ImplicationChecksByTransitivity, 91841.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=809occurred in iteration=39, InterpolantAutomatonStates: 1043, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 744.5ms AutomataMinimizationTime, 56 MinimizatonAttempts, 6547 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1257.7ms SsaConstructionTime, 15007.4ms SatisfiabilityAnalysisTime, 132680.0ms InterpolantComputationTime, 3288 NumberOfCodeBlocks, 3284 NumberOfCodeBlocksAsserted, 207 NumberOfCheckSat, 3181 ConstructedInterpolants, 147 QuantifiedInterpolants, 69627 SizeOfPredicates, 1383 NumberOfNonLiveVariables, 14448 ConjunctsInSsa, 1302 ConjunctsInUnsatCore, 107 InterpolantComputations, 6 PerfectInterpolantSequences, 890/2573 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 21:51:43,866 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...