./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/figure1-alt.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/figure1-alt.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 df5f38b4a339663cff2ec689c86fcccb637ae6bf ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-04 18:52:39,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 18:52:39,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 18:52:39,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 18:52:39,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 18:52:39,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 18:52:39,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 18:52:39,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 18:52:39,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 18:52:39,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 18:52:39,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 18:52:39,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 18:52:39,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 18:52:39,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 18:52:39,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 18:52:39,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 18:52:39,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 18:52:39,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 18:52:39,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 18:52:39,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 18:52:39,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 18:52:39,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 18:52:39,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 18:52:39,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 18:52:39,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 18:52:39,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 18:52:39,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 18:52:39,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 18:52:39,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 18:52:39,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 18:52:39,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 18:52:39,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 18:52:39,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 18:52:39,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 18:52:39,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 18:52:39,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 18:52:39,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 18:52:39,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 18:52:39,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 18:52:39,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 18:52:39,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 18:52:39,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 18:52:39,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 18:52:39,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 18:52:39,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 18:52:39,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 18:52:39,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 18:52:39,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 18:52:39,135 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 18:52:39,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 18:52:39,135 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 18:52:39,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 18:52:39,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 18:52:39,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 18:52:39,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 18:52:39,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 18:52:39,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 18:52:39,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 18:52:39,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 18:52:39,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 18:52:39,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 18:52:39,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 18:52:39,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 18:52:39,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 18:52:39,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 18:52:39,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 18:52:39,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 18:52:39,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 18:52:39,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 18:52:39,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 18:52:39,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 18:52:39,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 18:52:39,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df5f38b4a339663cff2ec689c86fcccb637ae6bf [2021-10-04 18:52:39,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 18:52:39,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 18:52:39,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 18:52:39,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 18:52:39,531 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 18:52:39,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-04 18:52:39,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0832c569f/2e0288a57bc74722bb5296de10ee9396/FLAG5db4579c4 [2021-10-04 18:52:40,209 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 18:52:40,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-04 18:52:40,210 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 18:52:40,211 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 18:52:40,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0832c569f/2e0288a57bc74722bb5296de10ee9396/FLAG5db4579c4 [2021-10-04 18:52:40,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0832c569f/2e0288a57bc74722bb5296de10ee9396 [2021-10-04 18:52:40,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 18:52:40,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 18:52:40,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 18:52:40,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 18:52:40,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 18:52:40,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ebc3896 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40, skipping insertion in model container [2021-10-04 18:52:40,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 18:52:40,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 18:52:40,441 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 18:52:40,497 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/figure1-alt.wvr.c[1038,1051] [2021-10-04 18:52:40,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 18:52:40,511 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 18:52:40,522 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 18:52:40,531 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/figure1-alt.wvr.c[1038,1051] [2021-10-04 18:52:40,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 18:52:40,547 INFO L208 MainTranslator]: Completed translation [2021-10-04 18:52:40,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40 WrapperNode [2021-10-04 18:52:40,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 18:52:40,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 18:52:40,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 18:52:40,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 18:52:40,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 18:52:40,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 18:52:40,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 18:52:40,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 18:52:40,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 18:52:40,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 18:52:40,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 18:52:40,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 18:52:40,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (1/1) ... [2021-10-04 18:52:40,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 18:52:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:40,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-04 18:52:40,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-04 18:52:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 18:52:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 18:52:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 18:52:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 18:52:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 18:52:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 18:52:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-04 18:52:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-04 18:52:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 18:52:40,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 18:52:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 18:52:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 18:52:40,727 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 18:52:41,184 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 18:52:41,184 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-04 18:52:41,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:52:41 BoogieIcfgContainer [2021-10-04 18:52:41,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 18:52:41,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 18:52:41,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 18:52:41,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 18:52:41,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 06:52:40" (1/3) ... [2021-10-04 18:52:41,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f37acae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 06:52:41, skipping insertion in model container [2021-10-04 18:52:41,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 06:52:40" (2/3) ... [2021-10-04 18:52:41,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f37acae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 06:52:41, skipping insertion in model container [2021-10-04 18:52:41,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:52:41" (3/3) ... [2021-10-04 18:52:41,198 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.c [2021-10-04 18:52:41,208 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 18:52:41,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 18:52:41,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 18:52:41,209 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 18:52:41,240 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,241 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,242 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,242 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,242 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,243 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,243 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,244 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,244 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,245 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,245 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,245 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,245 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,246 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,246 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,246 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,247 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,247 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,247 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,248 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,248 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,248 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,248 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,249 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,249 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,249 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,250 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,250 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,250 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,251 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,251 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,252 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,252 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,255 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,256 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,256 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,256 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,257 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,257 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,257 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,260 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,260 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,260 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,261 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,261 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 18:52:41,268 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-04 18:52:41,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 18:52:41,326 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-04 18:52:41,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-04 18:52:41,342 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 18:52:41,354 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 160 flow [2021-10-04 18:52:41,358 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 160 flow [2021-10-04 18:52:41,360 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 160 flow [2021-10-04 18:52:41,406 INFO L129 PetriNetUnfolder]: 6/70 cut-off events. [2021-10-04 18:52:41,406 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-04 18:52:41,410 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 6/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2021-10-04 18:52:41,413 INFO L116 LiptonReduction]: Number of co-enabled transitions 432 [2021-10-04 18:52:43,438 INFO L131 LiptonReduction]: Checked pairs total: 436 [2021-10-04 18:52:43,438 INFO L133 LiptonReduction]: Total number of compositions: 61 [2021-10-04 18:52:43,447 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-10-04 18:52:43,473 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:52:43,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:43,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:43,500 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1306465042, now seen corresponding path program 1 times [2021-10-04 18:52:43,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:43,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886028201] [2021-10-04 18:52:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:43,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:44,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:44,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886028201] [2021-10-04 18:52:44,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886028201] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:44,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:44,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:44,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848330464] [2021-10-04 18:52:44,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:44,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:44,120 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 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 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:44,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:44,178 INFO L93 Difference]: Finished difference Result 71 states and 150 transitions. [2021-10-04 18:52:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:52:44,179 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:52:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:44,189 INFO L225 Difference]: With dead ends: 71 [2021-10-04 18:52:44,190 INFO L226 Difference]: Without dead ends: 66 [2021-10-04 18:52:44,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-04 18:52:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-10-04 18:52:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-10-04 18:52:44,235 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-10-04 18:52:44,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:44,235 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-10-04 18:52:44,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-10-04 18:52:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:52:44,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:44,237 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:44,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 18:52:44,238 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash -835073200, now seen corresponding path program 2 times [2021-10-04 18:52:44,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:44,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086812569] [2021-10-04 18:52:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:44,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:44,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:44,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086812569] [2021-10-04 18:52:44,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086812569] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:44,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:44,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:44,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568580279] [2021-10-04 18:52:44,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:44,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:44,545 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:44,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:44,690 INFO L93 Difference]: Finished difference Result 81 states and 166 transitions. [2021-10-04 18:52:44,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:52:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:52:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:44,693 INFO L225 Difference]: With dead ends: 81 [2021-10-04 18:52:44,693 INFO L226 Difference]: Without dead ends: 76 [2021-10-04 18:52:44,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:52:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-04 18:52:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2021-10-04 18:52:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-04 18:52:44,704 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-04 18:52:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:44,705 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-04 18:52:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-04 18:52:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:52:44,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:44,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:44,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-04 18:52:44,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -779661940, now seen corresponding path program 3 times [2021-10-04 18:52:44,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:44,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187202576] [2021-10-04 18:52:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:44,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:44,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:44,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187202576] [2021-10-04 18:52:44,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187202576] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:44,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:44,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:44,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174549856] [2021-10-04 18:52:44,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:44,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:44,961 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:45,033 INFO L93 Difference]: Finished difference Result 75 states and 159 transitions. [2021-10-04 18:52:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:52:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:52:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:45,035 INFO L225 Difference]: With dead ends: 75 [2021-10-04 18:52:45,035 INFO L226 Difference]: Without dead ends: 70 [2021-10-04 18:52:45,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-04 18:52:45,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-10-04 18:52:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-04 18:52:45,045 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-04 18:52:45,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:45,045 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-04 18:52:45,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-04 18:52:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:52:45,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:45,047 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:45,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-04 18:52:45,048 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1857733226, now seen corresponding path program 4 times [2021-10-04 18:52:45,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:45,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626373628] [2021-10-04 18:52:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:45,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:45,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:45,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626373628] [2021-10-04 18:52:45,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626373628] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:45,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:45,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:45,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567722572] [2021-10-04 18:52:45,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:45,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:45,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:45,281 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:45,403 INFO L93 Difference]: Finished difference Result 97 states and 198 transitions. [2021-10-04 18:52:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:52:45,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:52:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:45,406 INFO L225 Difference]: With dead ends: 97 [2021-10-04 18:52:45,406 INFO L226 Difference]: Without dead ends: 92 [2021-10-04 18:52:45,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-04 18:52:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-04 18:52:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2021-10-04 18:52:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 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) [2021-10-04 18:52:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2021-10-04 18:52:45,416 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 13 [2021-10-04 18:52:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:45,416 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2021-10-04 18:52:45,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2021-10-04 18:52:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:52:45,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:45,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:45,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-04 18:52:45,419 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:45,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1802321966, now seen corresponding path program 5 times [2021-10-04 18:52:45,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:45,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994133323] [2021-10-04 18:52:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:45,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:45,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:45,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994133323] [2021-10-04 18:52:45,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994133323] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:45,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:45,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:45,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619892337] [2021-10-04 18:52:45,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:45,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:45,644 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:45,699 INFO L93 Difference]: Finished difference Result 91 states and 191 transitions. [2021-10-04 18:52:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:52:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:52:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:45,703 INFO L225 Difference]: With dead ends: 91 [2021-10-04 18:52:45,703 INFO L226 Difference]: Without dead ends: 86 [2021-10-04 18:52:45,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-04 18:52:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-10-04 18:52:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 121 transitions. [2021-10-04 18:52:45,720 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 121 transitions. Word has length 13 [2021-10-04 18:52:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:45,721 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 121 transitions. [2021-10-04 18:52:45,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 121 transitions. [2021-10-04 18:52:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-04 18:52:45,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:45,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:45,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-04 18:52:45,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash -145930626, now seen corresponding path program 6 times [2021-10-04 18:52:45,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:45,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568944414] [2021-10-04 18:52:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:45,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:45,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:45,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568944414] [2021-10-04 18:52:45,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568944414] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:45,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:45,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-04 18:52:45,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797823257] [2021-10-04 18:52:45,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-04 18:52:45,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:45,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-04 18:52:45,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-04 18:52:45,928 INFO L87 Difference]: Start difference. First operand 54 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:46,065 INFO L93 Difference]: Finished difference Result 77 states and 163 transitions. [2021-10-04 18:52:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 18:52:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-04 18:52:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:46,066 INFO L225 Difference]: With dead ends: 77 [2021-10-04 18:52:46,067 INFO L226 Difference]: Without dead ends: 72 [2021-10-04 18:52:46,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-10-04 18:52:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-04 18:52:46,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-10-04 18:52:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-04 18:52:46,073 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-04 18:52:46,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:46,073 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-04 18:52:46,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,073 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-04 18:52:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:46,074 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:46,074 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:46,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-04 18:52:46,075 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1846273340, now seen corresponding path program 1 times [2021-10-04 18:52:46,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:46,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176221026] [2021-10-04 18:52:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:46,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:46,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:46,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176221026] [2021-10-04 18:52:46,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176221026] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 18:52:46,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 18:52:46,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-04 18:52:46,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712839257] [2021-10-04 18:52:46,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 18:52:46,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:46,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 18:52:46,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 18:52:46,118 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:46,124 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2021-10-04 18:52:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 18:52:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:46,127 INFO L225 Difference]: With dead ends: 52 [2021-10-04 18:52:46,127 INFO L226 Difference]: Without dead ends: 42 [2021-10-04 18:52:46,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 18:52:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-04 18:52:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-04 18:52:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-10-04 18:52:46,136 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 14 [2021-10-04 18:52:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:46,137 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-10-04 18:52:46,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-10-04 18:52:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:46,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:46,140 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:46,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-04 18:52:46,141 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash -12282784, now seen corresponding path program 1 times [2021-10-04 18:52:46,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:46,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217899396] [2021-10-04 18:52:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:46,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:46,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:46,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217899396] [2021-10-04 18:52:46,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217899396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:46,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417953665] [2021-10-04 18:52:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:46,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:46,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:46,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:46,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-04 18:52:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:46,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417953665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:46,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:46,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:46,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303489408] [2021-10-04 18:52:46,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:46,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:46,741 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:46,918 INFO L93 Difference]: Finished difference Result 99 states and 191 transitions. [2021-10-04 18:52:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:52:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:46,920 INFO L225 Difference]: With dead ends: 99 [2021-10-04 18:52:46,920 INFO L226 Difference]: Without dead ends: 94 [2021-10-04 18:52:46,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:52:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-04 18:52:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-10-04 18:52:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.253731343283582) internal successors, (151), 67 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 151 transitions. [2021-10-04 18:52:46,927 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 151 transitions. Word has length 14 [2021-10-04 18:52:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:46,927 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 151 transitions. [2021-10-04 18:52:46,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 151 transitions. [2021-10-04 18:52:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:46,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:46,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:46,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:47,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:47,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2141146270, now seen corresponding path program 2 times [2021-10-04 18:52:47,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:47,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032116062] [2021-10-04 18:52:47,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:47,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:47,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:47,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032116062] [2021-10-04 18:52:47,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032116062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:47,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55216182] [2021-10-04 18:52:47,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:52:47,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:47,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:47,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:47,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-04 18:52:47,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:47,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:47,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:47,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:47,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55216182] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:47,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:47,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:47,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231955006] [2021-10-04 18:52:47,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:47,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:47,638 INFO L87 Difference]: Start difference. First operand 68 states and 151 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:47,860 INFO L93 Difference]: Finished difference Result 129 states and 247 transitions. [2021-10-04 18:52:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-04 18:52:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:47,862 INFO L225 Difference]: With dead ends: 129 [2021-10-04 18:52:47,862 INFO L226 Difference]: Without dead ends: 124 [2021-10-04 18:52:47,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-04 18:52:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-04 18:52:47,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-10-04 18:52:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-04 18:52:47,869 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-04 18:52:47,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:47,869 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-04 18:52:47,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-04 18:52:47,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:47,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:47,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:47,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:48,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:48,085 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2098409766, now seen corresponding path program 3 times [2021-10-04 18:52:48,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:48,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528962131] [2021-10-04 18:52:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:48,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:48,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:48,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528962131] [2021-10-04 18:52:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528962131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:48,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296703309] [2021-10-04 18:52:48,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:52:48,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:48,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:48,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:48,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-04 18:52:48,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:52:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:48,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296703309] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:48,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:48,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:48,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065331733] [2021-10-04 18:52:48,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:48,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:48,625 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:48,889 INFO L93 Difference]: Finished difference Result 123 states and 240 transitions. [2021-10-04 18:52:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-04 18:52:48,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:48,891 INFO L225 Difference]: With dead ends: 123 [2021-10-04 18:52:48,892 INFO L226 Difference]: Without dead ends: 118 [2021-10-04 18:52:48,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-04 18:52:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-04 18:52:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2021-10-04 18:52:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-04 18:52:48,899 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-04 18:52:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:48,900 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-04 18:52:48,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-04 18:52:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:48,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:48,901 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:48,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:49,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:49,116 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash 484293112, now seen corresponding path program 4 times [2021-10-04 18:52:49,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:49,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126760381] [2021-10-04 18:52:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:49,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:49,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:49,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126760381] [2021-10-04 18:52:49,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126760381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:49,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081384029] [2021-10-04 18:52:49,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:52:49,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:49,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:49,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-04 18:52:49,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:52:49,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:49,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081384029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:49,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:49,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:49,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574550856] [2021-10-04 18:52:49,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:49,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:49,624 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:49,722 INFO L93 Difference]: Finished difference Result 83 states and 180 transitions. [2021-10-04 18:52:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 18:52:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:49,725 INFO L225 Difference]: With dead ends: 83 [2021-10-04 18:52:49,725 INFO L226 Difference]: Without dead ends: 78 [2021-10-04 18:52:49,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-04 18:52:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-04 18:52:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-10-04 18:52:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-04 18:52:49,730 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-04 18:52:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:49,730 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-04 18:52:49,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-04 18:52:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:49,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:49,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:49,766 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 [2021-10-04 18:52:49,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-04 18:52:49,945 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1153396622, now seen corresponding path program 5 times [2021-10-04 18:52:49,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:49,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166764990] [2021-10-04 18:52:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:49,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:50,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:50,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166764990] [2021-10-04 18:52:50,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166764990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:50,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969461466] [2021-10-04 18:52:50,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:52:50,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:50,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:50,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:50,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-04 18:52:50,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:50,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:50,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:50,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:50,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969461466] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:50,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:50,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:50,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457403056] [2021-10-04 18:52:50,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:50,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:50,420 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:50,534 INFO L93 Difference]: Finished difference Result 85 states and 183 transitions. [2021-10-04 18:52:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 18:52:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:50,537 INFO L225 Difference]: With dead ends: 85 [2021-10-04 18:52:50,537 INFO L226 Difference]: Without dead ends: 80 [2021-10-04 18:52:50,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:52:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-04 18:52:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-10-04 18:52:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-04 18:52:50,542 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-04 18:52:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:50,543 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-04 18:52:50,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-04 18:52:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:50,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:50,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:50,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-04 18:52:50,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:50,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:50,759 INFO L82 PathProgramCache]: Analyzing trace with hash 561973854, now seen corresponding path program 6 times [2021-10-04 18:52:50,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:50,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131648074] [2021-10-04 18:52:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:50,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:50,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:50,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131648074] [2021-10-04 18:52:50,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131648074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:50,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697992883] [2021-10-04 18:52:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:52:50,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:50,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:50,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-04 18:52:51,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:52:51,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:51,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:51,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697992883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:51,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:51,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:51,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352610826] [2021-10-04 18:52:51,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:51,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:51,293 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:51,557 INFO L93 Difference]: Finished difference Result 115 states and 225 transitions. [2021-10-04 18:52:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:52:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:51,559 INFO L225 Difference]: With dead ends: 115 [2021-10-04 18:52:51,559 INFO L226 Difference]: Without dead ends: 110 [2021-10-04 18:52:51,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-10-04 18:52:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-04 18:52:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 74. [2021-10-04 18:52:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-04 18:52:51,566 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-04 18:52:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:51,567 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-04 18:52:51,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-04 18:52:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:51,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:51,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:51,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:51,782 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,SelfDestructingSolverStorable12 [2021-10-04 18:52:51,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 617385114, now seen corresponding path program 7 times [2021-10-04 18:52:51,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:51,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027896] [2021-10-04 18:52:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:51,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:51,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:51,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027896] [2021-10-04 18:52:51,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:51,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755868665] [2021-10-04 18:52:51,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:52:51,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:51,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-04 18:52:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:52,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:52,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755868665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:52,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:52,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521309604] [2021-10-04 18:52:52,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:52,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:52,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:52,339 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:52,577 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-10-04 18:52:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 18:52:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:52,579 INFO L225 Difference]: With dead ends: 107 [2021-10-04 18:52:52,579 INFO L226 Difference]: Without dead ends: 102 [2021-10-04 18:52:52,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-10-04 18:52:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-04 18:52:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2021-10-04 18:52:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:52,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-04 18:52:52,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-04 18:52:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:52,585 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-04 18:52:52,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-04 18:52:52,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-04 18:52:52,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:52,586 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:52,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-04 18:52:52,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-04 18:52:52,802 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 372876426, now seen corresponding path program 8 times [2021-10-04 18:52:52,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:52,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17787877] [2021-10-04 18:52:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:52,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:52,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:52,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17787877] [2021-10-04 18:52:52,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17787877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:52,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905496687] [2021-10-04 18:52:52,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:52:52,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:52,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:52,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:52,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-04 18:52:53,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:53,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:53,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905496687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:53,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:53,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-04 18:52:53,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506852928] [2021-10-04 18:52:53,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:53,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:53,315 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:53,422 INFO L93 Difference]: Finished difference Result 75 states and 155 transitions. [2021-10-04 18:52:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 18:52:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-04 18:52:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:53,426 INFO L225 Difference]: With dead ends: 75 [2021-10-04 18:52:53,426 INFO L226 Difference]: Without dead ends: 70 [2021-10-04 18:52:53,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:52:53,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-04 18:52:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-10-04 18:52:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-04 18:52:53,433 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-04 18:52:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:53,434 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-04 18:52:53,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:53,434 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-04 18:52:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:53,435 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:53,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:53,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:53,649 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,SelfDestructingSolverStorable14 [2021-10-04 18:52:53,650 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash -380203602, now seen corresponding path program 1 times [2021-10-04 18:52:53,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:53,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059745709] [2021-10-04 18:52:53,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:53,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:53,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:53,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059745709] [2021-10-04 18:52:53,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059745709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:53,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235811727] [2021-10-04 18:52:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:53,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:53,756 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:53,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-04 18:52:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:53,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:52:53,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:54,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235811727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:54,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:54,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-04 18:52:54,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099479044] [2021-10-04 18:52:54,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:52:54,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:52:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:52:54,140 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:52:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:54,259 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-10-04 18:52:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:52:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-04 18:52:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:54,261 INFO L225 Difference]: With dead ends: 87 [2021-10-04 18:52:54,261 INFO L226 Difference]: Without dead ends: 68 [2021-10-04 18:52:54,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-04 18:52:54,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-04 18:52:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-10-04 18:52:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 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) [2021-10-04 18:52:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-10-04 18:52:54,265 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 15 [2021-10-04 18:52:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:54,265 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-10-04 18:52:54,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:52:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-10-04 18:52:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:54,267 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:54,267 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:54,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:54,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:54,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:54,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:54,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2056207570, now seen corresponding path program 9 times [2021-10-04 18:52:54,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:54,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947955989] [2021-10-04 18:52:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:54,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:54,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:54,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947955989] [2021-10-04 18:52:54,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947955989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:54,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808393119] [2021-10-04 18:52:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:52:54,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:54,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:54,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-04 18:52:54,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:52:54,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:54,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:52:54,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:55,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808393119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:55,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:55,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:52:55,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785850521] [2021-10-04 18:52:55,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:52:55,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:52:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:52:55,098 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:55,450 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-10-04 18:52:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 18:52:55,451 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:52:55,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:55,452 INFO L225 Difference]: With dead ends: 124 [2021-10-04 18:52:55,452 INFO L226 Difference]: Without dead ends: 114 [2021-10-04 18:52:55,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-10-04 18:52:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-04 18:52:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 64. [2021-10-04 18:52:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-10-04 18:52:55,457 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-10-04 18:52:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-10-04 18:52:55,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-10-04 18:52:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:55,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:55,458 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:55,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:55,672 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,SelfDestructingSolverStorable16 [2021-10-04 18:52:55,673 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:55,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash -85330672, now seen corresponding path program 10 times [2021-10-04 18:52:55,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:55,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722024345] [2021-10-04 18:52:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:55,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:55,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:55,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722024345] [2021-10-04 18:52:55,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722024345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:55,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848670297] [2021-10-04 18:52:55,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:52:55,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:55,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:55,846 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:55,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-04 18:52:56,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:52:56,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:52:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848670297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:56,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:56,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:52:56,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745828616] [2021-10-04 18:52:56,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:52:56,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:52:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:52:56,336 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:56,934 INFO L93 Difference]: Finished difference Result 171 states and 340 transitions. [2021-10-04 18:52:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 18:52:56,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:52:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:56,938 INFO L225 Difference]: With dead ends: 171 [2021-10-04 18:52:56,938 INFO L226 Difference]: Without dead ends: 156 [2021-10-04 18:52:56,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 587.8ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-10-04 18:52:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-04 18:52:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 72. [2021-10-04 18:52:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2021-10-04 18:52:56,944 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 15 [2021-10-04 18:52:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:56,944 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2021-10-04 18:52:56,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:56,945 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2021-10-04 18:52:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:56,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:56,948 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:56,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:57,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-04 18:52:57,161 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:57,162 INFO L82 PathProgramCache]: Analyzing trace with hash -29919412, now seen corresponding path program 11 times [2021-10-04 18:52:57,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:57,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474740452] [2021-10-04 18:52:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:57,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:57,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:57,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474740452] [2021-10-04 18:52:57,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474740452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:57,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130566535] [2021-10-04 18:52:57,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:52:57,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:57,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:57,310 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:57,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-04 18:52:57,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:52:57,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:52:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:57,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130566535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:57,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:57,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:52:57,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97269888] [2021-10-04 18:52:57,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:52:57,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:52:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:52:57,836 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:58,372 INFO L93 Difference]: Finished difference Result 164 states and 332 transitions. [2021-10-04 18:52:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:52:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:52:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:58,377 INFO L225 Difference]: With dead ends: 164 [2021-10-04 18:52:58,378 INFO L226 Difference]: Without dead ends: 154 [2021-10-04 18:52:58,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-10-04 18:52:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-04 18:52:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 72. [2021-10-04 18:52:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2021-10-04 18:52:58,384 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 15 [2021-10-04 18:52:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:58,385 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2021-10-04 18:52:58,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2021-10-04 18:52:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:58,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:58,386 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:58,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:58,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:58,587 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:58,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:58,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1742183830, now seen corresponding path program 12 times [2021-10-04 18:52:58,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:58,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341690027] [2021-10-04 18:52:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:58,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:58,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:58,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341690027] [2021-10-04 18:52:58,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341690027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:58,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673783244] [2021-10-04 18:52:58,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:52:58,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:58,688 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:58,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-04 18:52:58,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:52:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:52:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:52:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:52:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:59,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673783244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:59,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:52:59,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:52:59,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839953454] [2021-10-04 18:52:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:52:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:52:59,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:52:59,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:52:59,212 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:59,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:52:59,594 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-10-04 18:52:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:52:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:52:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:52:59,596 INFO L225 Difference]: With dead ends: 156 [2021-10-04 18:52:59,596 INFO L226 Difference]: Without dead ends: 130 [2021-10-04 18:52:59,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-10-04 18:52:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-04 18:52:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 74. [2021-10-04 18:52:59,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2739726027397262) internal successors, (166), 73 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:52:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 166 transitions. [2021-10-04 18:52:59,602 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 166 transitions. Word has length 15 [2021-10-04 18:52:59,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:52:59,602 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 166 transitions. [2021-10-04 18:52:59,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:52:59,602 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 166 transitions. [2021-10-04 18:52:59,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:52:59,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:52:59,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:52:59,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-04 18:52:59,816 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,SelfDestructingSolverStorable19 [2021-10-04 18:52:59,817 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:52:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:52:59,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1471992914, now seen corresponding path program 2 times [2021-10-04 18:52:59,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:52:59,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543011984] [2021-10-04 18:52:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:52:59,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:52:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:52:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:52:59,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:52:59,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543011984] [2021-10-04 18:52:59,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543011984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:52:59,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037881535] [2021-10-04 18:52:59,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:52:59,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:52:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:52:59,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:52:59,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-04 18:53:00,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:00,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037881535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:00,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:00,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-04 18:53:00,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340286840] [2021-10-04 18:53:00,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:53:00,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:53:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:53:00,371 INFO L87 Difference]: Start difference. First operand 74 states and 166 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:53:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:00,481 INFO L93 Difference]: Finished difference Result 97 states and 201 transitions. [2021-10-04 18:53:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:00,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-04 18:53:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:00,483 INFO L225 Difference]: With dead ends: 97 [2021-10-04 18:53:00,483 INFO L226 Difference]: Without dead ends: 84 [2021-10-04 18:53:00,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-04 18:53:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-10-04 18:53:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.28) internal successors, (171), 75 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 171 transitions. [2021-10-04 18:53:00,488 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 171 transitions. Word has length 15 [2021-10-04 18:53:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:00,488 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 171 transitions. [2021-10-04 18:53:00,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:53:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 171 transitions. [2021-10-04 18:53:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:00,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:00,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:00,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:00,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:00,704 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 718139218, now seen corresponding path program 3 times [2021-10-04 18:53:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:00,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541571828] [2021-10-04 18:53:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:00,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:00,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:00,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541571828] [2021-10-04 18:53:00,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541571828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:00,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42252973] [2021-10-04 18:53:00,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:00,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:00,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:00,838 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) [2021-10-04 18:53:00,867 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 [2021-10-04 18:53:01,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 18:53:01,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:01,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42252973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:01,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:01,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-04 18:53:01,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931492010] [2021-10-04 18:53:01,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:53:01,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:01,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:53:01,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:53:01,301 INFO L87 Difference]: Start difference. First operand 76 states and 171 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:53:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:01,417 INFO L93 Difference]: Finished difference Result 103 states and 209 transitions. [2021-10-04 18:53:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-04 18:53:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:01,419 INFO L225 Difference]: With dead ends: 103 [2021-10-04 18:53:01,419 INFO L226 Difference]: Without dead ends: 98 [2021-10-04 18:53:01,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-04 18:53:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2021-10-04 18:53:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.311688311688312) internal successors, (178), 77 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 178 transitions. [2021-10-04 18:53:01,424 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 178 transitions. Word has length 15 [2021-10-04 18:53:01,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:01,424 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 178 transitions. [2021-10-04 18:53:01,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:53:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 178 transitions. [2021-10-04 18:53:01,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:01,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:01,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:01,464 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 [2021-10-04 18:53:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:01,641 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash 773550478, now seen corresponding path program 4 times [2021-10-04 18:53:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:01,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66741286] [2021-10-04 18:53:01,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:01,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:01,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:01,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66741286] [2021-10-04 18:53:01,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66741286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:01,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205191077] [2021-10-04 18:53:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:01,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:01,757 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) [2021-10-04 18:53:01,787 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 [2021-10-04 18:53:02,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:02,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:02,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205191077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:02,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:02,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-04 18:53:02,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481524375] [2021-10-04 18:53:02,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 18:53:02,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 18:53:02,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-04 18:53:02,246 INFO L87 Difference]: Start difference. First operand 78 states and 178 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:53:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:02,347 INFO L93 Difference]: Finished difference Result 97 states and 202 transitions. [2021-10-04 18:53:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:02,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 15 [2021-10-04 18:53:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:02,349 INFO L225 Difference]: With dead ends: 97 [2021-10-04 18:53:02,349 INFO L226 Difference]: Without dead ends: 88 [2021-10-04 18:53:02,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-04 18:53:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-10-04 18:53:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 77 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:02,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 176 transitions. [2021-10-04 18:53:02,353 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 176 transitions. Word has length 15 [2021-10-04 18:53:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:02,354 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 176 transitions. [2021-10-04 18:53:02,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2021-10-04 18:53:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 176 transitions. [2021-10-04 18:53:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:02,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:02,355 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:02,380 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 [2021-10-04 18:53:02,564 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,SelfDestructingSolverStorable22 [2021-10-04 18:53:02,565 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -26813354, now seen corresponding path program 13 times [2021-10-04 18:53:02,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:02,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990813754] [2021-10-04 18:53:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:02,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:02,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:02,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990813754] [2021-10-04 18:53:02,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990813754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:02,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325277548] [2021-10-04 18:53:02,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:02,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:02,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:02,684 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) [2021-10-04 18:53:02,710 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 [2021-10-04 18:53:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:02,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:03,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325277548] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:03,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:03,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:03,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901314133] [2021-10-04 18:53:03,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:03,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:03,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:03,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:03,243 INFO L87 Difference]: Start difference. First operand 78 states and 176 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:03,702 INFO L93 Difference]: Finished difference Result 154 states and 302 transitions. [2021-10-04 18:53:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:53:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:03,705 INFO L225 Difference]: With dead ends: 154 [2021-10-04 18:53:03,705 INFO L226 Difference]: Without dead ends: 140 [2021-10-04 18:53:03,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-10-04 18:53:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-04 18:53:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 76. [2021-10-04 18:53:03,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.28) internal successors, (171), 75 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 171 transitions. [2021-10-04 18:53:03,710 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 171 transitions. Word has length 15 [2021-10-04 18:53:03,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:03,710 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 171 transitions. [2021-10-04 18:53:03,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 171 transitions. [2021-10-04 18:53:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:03,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:03,712 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:03,748 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 [2021-10-04 18:53:03,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:03,927 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:03,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 28597906, now seen corresponding path program 14 times [2021-10-04 18:53:03,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:03,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684904117] [2021-10-04 18:53:03,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:03,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:04,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:04,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684904117] [2021-10-04 18:53:04,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684904117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:04,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600484600] [2021-10-04 18:53:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:04,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:04,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:04,061 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) [2021-10-04 18:53:04,061 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 [2021-10-04 18:53:04,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:04,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:04,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:04,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600484600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:04,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:04,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:04,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590056474] [2021-10-04 18:53:04,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:04,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:04,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:04,650 INFO L87 Difference]: Start difference. First operand 76 states and 171 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:05,152 INFO L93 Difference]: Finished difference Result 138 states and 282 transitions. [2021-10-04 18:53:05,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:53:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:05,154 INFO L225 Difference]: With dead ends: 138 [2021-10-04 18:53:05,154 INFO L226 Difference]: Without dead ends: 128 [2021-10-04 18:53:05,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-10-04 18:53:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-04 18:53:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2021-10-04 18:53:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 164 transitions. [2021-10-04 18:53:05,160 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 164 transitions. Word has length 15 [2021-10-04 18:53:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:05,160 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 164 transitions. [2021-10-04 18:53:05,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:05,160 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 164 transitions. [2021-10-04 18:53:05,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:05,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:05,161 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:05,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-04 18:53:05,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:05,371 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:05,372 INFO L82 PathProgramCache]: Analyzing trace with hash 342043944, now seen corresponding path program 5 times [2021-10-04 18:53:05,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:05,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712341351] [2021-10-04 18:53:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:05,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:05,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:05,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712341351] [2021-10-04 18:53:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712341351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:05,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687833678] [2021-10-04 18:53:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:05,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:05,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:05,517 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) [2021-10-04 18:53:05,538 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 [2021-10-04 18:53:05,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:05,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-04 18:53:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:06,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687833678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:06,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:06,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:06,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580207198] [2021-10-04 18:53:06,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:06,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:06,072 INFO L87 Difference]: Start difference. First operand 74 states and 164 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:06,240 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-10-04 18:53:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:06,242 INFO L225 Difference]: With dead ends: 101 [2021-10-04 18:53:06,242 INFO L226 Difference]: Without dead ends: 88 [2021-10-04 18:53:06,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-04 18:53:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-04 18:53:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2021-10-04 18:53:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 162 transitions. [2021-10-04 18:53:06,246 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 162 transitions. Word has length 15 [2021-10-04 18:53:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 162 transitions. [2021-10-04 18:53:06,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 162 transitions. [2021-10-04 18:53:06,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:06,247 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:06,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:06,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-04 18:53:06,461 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,SelfDestructingSolverStorable25 [2021-10-04 18:53:06,462 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:06,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1762791220, now seen corresponding path program 6 times [2021-10-04 18:53:06,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:06,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793322861] [2021-10-04 18:53:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:06,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:06,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:06,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793322861] [2021-10-04 18:53:06,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793322861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:06,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115997475] [2021-10-04 18:53:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:06,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:06,589 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) [2021-10-04 18:53:06,590 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 [2021-10-04 18:53:06,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 18:53:06,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:06,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:07,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115997475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:07,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:07,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-04 18:53:07,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616546627] [2021-10-04 18:53:07,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 18:53:07,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:07,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 18:53:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:53:07,110 INFO L87 Difference]: Start difference. First operand 74 states and 162 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:07,230 INFO L93 Difference]: Finished difference Result 93 states and 190 transitions. [2021-10-04 18:53:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-04 18:53:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:07,231 INFO L225 Difference]: With dead ends: 93 [2021-10-04 18:53:07,231 INFO L226 Difference]: Without dead ends: 88 [2021-10-04 18:53:07,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-04 18:53:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-10-04 18:53:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2533333333333334) internal successors, (169), 75 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 169 transitions. [2021-10-04 18:53:07,235 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 169 transitions. Word has length 15 [2021-10-04 18:53:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:07,237 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 169 transitions. [2021-10-04 18:53:07,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 169 transitions. [2021-10-04 18:53:07,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:07,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:07,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:07,282 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 [2021-10-04 18:53:07,460 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,SelfDestructingSolverStorable26 [2021-10-04 18:53:07,461 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1707379960, now seen corresponding path program 7 times [2021-10-04 18:53:07,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:07,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203035166] [2021-10-04 18:53:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:07,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:07,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:07,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203035166] [2021-10-04 18:53:07,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203035166] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:07,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726829203] [2021-10-04 18:53:07,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:07,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:07,574 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) [2021-10-04 18:53:07,576 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 [2021-10-04 18:53:07,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726829203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:08,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:08,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-04 18:53:08,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232426796] [2021-10-04 18:53:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 18:53:08,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:08,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 18:53:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:53:08,105 INFO L87 Difference]: Start difference. First operand 76 states and 169 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:08,206 INFO L93 Difference]: Finished difference Result 87 states and 183 transitions. [2021-10-04 18:53:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-04 18:53:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:08,207 INFO L225 Difference]: With dead ends: 87 [2021-10-04 18:53:08,207 INFO L226 Difference]: Without dead ends: 78 [2021-10-04 18:53:08,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-04 18:53:08,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-04 18:53:08,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.211267605633803) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 157 transitions. [2021-10-04 18:53:08,210 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 157 transitions. Word has length 15 [2021-10-04 18:53:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:08,210 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 157 transitions. [2021-10-04 18:53:08,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 157 transitions. [2021-10-04 18:53:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:08,211 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:08,211 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:08,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-04 18:53:08,411 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,SelfDestructingSolverStorable27 [2021-10-04 18:53:08,412 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:08,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:08,413 INFO L82 PathProgramCache]: Analyzing trace with hash -793798378, now seen corresponding path program 15 times [2021-10-04 18:53:08,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:08,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13897595] [2021-10-04 18:53:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:08,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:08,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:08,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13897595] [2021-10-04 18:53:08,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13897595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:08,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967915560] [2021-10-04 18:53:08,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:08,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:08,523 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) [2021-10-04 18:53:08,539 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 [2021-10-04 18:53:08,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:53:08,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:08,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:09,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967915560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:09,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:09,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:09,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848015501] [2021-10-04 18:53:09,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:09,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:09,127 INFO L87 Difference]: Start difference. First operand 72 states and 157 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:09,350 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-10-04 18:53:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-04 18:53:09,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:09,351 INFO L225 Difference]: With dead ends: 90 [2021-10-04 18:53:09,351 INFO L226 Difference]: Without dead ends: 72 [2021-10-04 18:53:09,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-10-04 18:53:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-04 18:53:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-04 18:53:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.183098591549296) internal successors, (155), 71 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 155 transitions. [2021-10-04 18:53:09,355 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 155 transitions. Word has length 15 [2021-10-04 18:53:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:09,355 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 155 transitions. [2021-10-04 18:53:09,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 155 transitions. [2021-10-04 18:53:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:09,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:09,356 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:09,388 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 [2021-10-04 18:53:09,556 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,SelfDestructingSolverStorable28 [2021-10-04 18:53:09,557 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash 843078826, now seen corresponding path program 16 times [2021-10-04 18:53:09,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:09,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829011152] [2021-10-04 18:53:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:09,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:09,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:09,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829011152] [2021-10-04 18:53:09,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829011152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:09,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667388830] [2021-10-04 18:53:09,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:09,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:09,674 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) [2021-10-04 18:53:09,695 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 [2021-10-04 18:53:10,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:10,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:10,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667388830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:10,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:10,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:10,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043982201] [2021-10-04 18:53:10,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:10,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:10,320 INFO L87 Difference]: Start difference. First operand 72 states and 155 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:10,664 INFO L93 Difference]: Finished difference Result 120 states and 229 transitions. [2021-10-04 18:53:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-04 18:53:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:10,665 INFO L225 Difference]: With dead ends: 120 [2021-10-04 18:53:10,665 INFO L226 Difference]: Without dead ends: 104 [2021-10-04 18:53:10,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:53:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-04 18:53:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2021-10-04 18:53:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-10-04 18:53:10,674 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 15 [2021-10-04 18:53:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-10-04 18:53:10,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-10-04 18:53:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:10,677 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:10,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:10,707 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 [2021-10-04 18:53:10,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:10,891 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:10,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1113269742, now seen corresponding path program 8 times [2021-10-04 18:53:10,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:10,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777125947] [2021-10-04 18:53:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:10,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:10,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:10,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777125947] [2021-10-04 18:53:10,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777125947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:10,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968009238] [2021-10-04 18:53:10,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:10,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:10,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:10,993 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) [2021-10-04 18:53:10,998 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 [2021-10-04 18:53:11,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:11,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:11,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:11,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968009238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:11,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:11,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-04 18:53:11,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027883754] [2021-10-04 18:53:11,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 18:53:11,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 18:53:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:53:11,539 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:11,629 INFO L93 Difference]: Finished difference Result 95 states and 189 transitions. [2021-10-04 18:53:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-04 18:53:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:11,631 INFO L225 Difference]: With dead ends: 95 [2021-10-04 18:53:11,631 INFO L226 Difference]: Without dead ends: 82 [2021-10-04 18:53:11,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-04 18:53:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-10-04 18:53:11,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1971830985915495) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 156 transitions. [2021-10-04 18:53:11,640 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 156 transitions. Word has length 15 [2021-10-04 18:53:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:11,641 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 156 transitions. [2021-10-04 18:53:11,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 156 transitions. [2021-10-04 18:53:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:11,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:11,644 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:11,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-04 18:53:11,859 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,SelfDestructingSolverStorable30 [2021-10-04 18:53:11,860 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash -991565422, now seen corresponding path program 9 times [2021-10-04 18:53:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:11,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030797771] [2021-10-04 18:53:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:11,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:11,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:11,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030797771] [2021-10-04 18:53:11,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030797771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:11,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547644455] [2021-10-04 18:53:11,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:11,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:11,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:11,972 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) [2021-10-04 18:53:11,989 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 [2021-10-04 18:53:12,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 18:53:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:12,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:12,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547644455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:12,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:12,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-04 18:53:12,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633155173] [2021-10-04 18:53:12,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 18:53:12,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 18:53:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:53:12,555 INFO L87 Difference]: Start difference. First operand 72 states and 156 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:12,656 INFO L93 Difference]: Finished difference Result 87 states and 173 transitions. [2021-10-04 18:53:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-04 18:53:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:12,658 INFO L225 Difference]: With dead ends: 87 [2021-10-04 18:53:12,658 INFO L226 Difference]: Without dead ends: 82 [2021-10-04 18:53:12,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:12,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-04 18:53:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-10-04 18:53:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1971830985915495) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 156 transitions. [2021-10-04 18:53:12,662 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 156 transitions. Word has length 15 [2021-10-04 18:53:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:12,663 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 156 transitions. [2021-10-04 18:53:12,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 156 transitions. [2021-10-04 18:53:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:12,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:12,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:12,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:12,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:12,877 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash -936154162, now seen corresponding path program 10 times [2021-10-04 18:53:12,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:12,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134552538] [2021-10-04 18:53:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:12,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:12,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:12,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134552538] [2021-10-04 18:53:12,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134552538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:12,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480718484] [2021-10-04 18:53:12,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:12,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:12,991 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) [2021-10-04 18:53:13,022 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 [2021-10-04 18:53:13,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:13,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 18:53:13,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:13,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480718484] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:13,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:13,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-04 18:53:13,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842450987] [2021-10-04 18:53:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 18:53:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 18:53:13,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-04 18:53:13,568 INFO L87 Difference]: Start difference. First operand 72 states and 156 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:13,662 INFO L93 Difference]: Finished difference Result 81 states and 166 transitions. [2021-10-04 18:53:13,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 18:53:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 15 [2021-10-04 18:53:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:13,663 INFO L225 Difference]: With dead ends: 81 [2021-10-04 18:53:13,663 INFO L226 Difference]: Without dead ends: 72 [2021-10-04 18:53:13,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-04 18:53:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-10-04 18:53:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1846153846153844) internal successors, (142), 65 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 142 transitions. [2021-10-04 18:53:13,667 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 142 transitions. Word has length 15 [2021-10-04 18:53:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:13,667 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 142 transitions. [2021-10-04 18:53:13,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 142 transitions. [2021-10-04 18:53:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:13,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:13,668 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:13,707 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 [2021-10-04 18:53:13,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:13,870 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1736517994, now seen corresponding path program 17 times [2021-10-04 18:53:13,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:13,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150199851] [2021-10-04 18:53:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:13,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:13,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:13,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150199851] [2021-10-04 18:53:13,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150199851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:13,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408901050] [2021-10-04 18:53:13,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:13,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:13,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:13,990 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) [2021-10-04 18:53:14,009 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 [2021-10-04 18:53:14,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:14,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:14,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408901050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:14,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:14,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:14,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897548163] [2021-10-04 18:53:14,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:14,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:14,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:14,675 INFO L87 Difference]: Start difference. First operand 66 states and 142 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:14,984 INFO L93 Difference]: Finished difference Result 122 states and 225 transitions. [2021-10-04 18:53:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-04 18:53:14,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:14,986 INFO L225 Difference]: With dead ends: 122 [2021-10-04 18:53:14,986 INFO L226 Difference]: Without dead ends: 108 [2021-10-04 18:53:14,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:53:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-04 18:53:14,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 64. [2021-10-04 18:53:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-10-04 18:53:14,990 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-10-04 18:53:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:14,990 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-10-04 18:53:14,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-10-04 18:53:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:14,991 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:14,992 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:15,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:15,199 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,SelfDestructingSolverStorable33 [2021-10-04 18:53:15,200 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1681106734, now seen corresponding path program 18 times [2021-10-04 18:53:15,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:15,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039870573] [2021-10-04 18:53:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:15,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:15,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:15,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039870573] [2021-10-04 18:53:15,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039870573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:15,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864300809] [2021-10-04 18:53:15,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:15,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:15,330 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) [2021-10-04 18:53:15,348 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 [2021-10-04 18:53:15,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:53:15,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864300809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:16,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:16,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:16,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724256515] [2021-10-04 18:53:16,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:16,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:16,018 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:16,381 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-10-04 18:53:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-04 18:53:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:16,382 INFO L225 Difference]: With dead ends: 106 [2021-10-04 18:53:16,382 INFO L226 Difference]: Without dead ends: 96 [2021-10-04 18:53:16,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:53:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-04 18:53:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2021-10-04 18:53:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2021-10-04 18:53:16,385 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2021-10-04 18:53:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:16,386 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2021-10-04 18:53:16,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2021-10-04 18:53:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-04 18:53:16,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:16,387 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:16,412 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 [2021-10-04 18:53:16,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-04 18:53:16,593 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -723974146, now seen corresponding path program 19 times [2021-10-04 18:53:16,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:16,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495104559] [2021-10-04 18:53:16,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:16,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:16,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:16,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495104559] [2021-10-04 18:53:16,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495104559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:16,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162356099] [2021-10-04 18:53:16,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:16,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:16,716 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) [2021-10-04 18:53:16,738 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 [2021-10-04 18:53:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:17,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162356099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:17,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:17,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-04 18:53:17,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877780287] [2021-10-04 18:53:17,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:17,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:17,446 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:17,673 INFO L93 Difference]: Finished difference Result 74 states and 143 transitions. [2021-10-04 18:53:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-04 18:53:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 15 [2021-10-04 18:53:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:17,675 INFO L225 Difference]: With dead ends: 74 [2021-10-04 18:53:17,675 INFO L226 Difference]: Without dead ends: 54 [2021-10-04 18:53:17,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-04 18:53:17,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-04 18:53:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-04 18:53:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-10-04 18:53:17,679 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 15 [2021-10-04 18:53:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:17,679 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-10-04 18:53:17,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2021-10-04 18:53:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-10-04 18:53:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:17,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:17,681 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:17,705 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 [2021-10-04 18:53:17,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:17,887 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:17,888 INFO L82 PathProgramCache]: Analyzing trace with hash -681512068, now seen corresponding path program 11 times [2021-10-04 18:53:17,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:17,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927390285] [2021-10-04 18:53:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:17,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:17,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:17,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927390285] [2021-10-04 18:53:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927390285] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:17,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328115622] [2021-10-04 18:53:17,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:17,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:17,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:17,988 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) [2021-10-04 18:53:17,989 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 [2021-10-04 18:53:18,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:18,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328115622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:18,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:18,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 18:53:18,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769644795] [2021-10-04 18:53:18,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:18,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:18,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:18,685 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:18,926 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-10-04 18:53:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:18,928 INFO L225 Difference]: With dead ends: 106 [2021-10-04 18:53:18,928 INFO L226 Difference]: Without dead ends: 96 [2021-10-04 18:53:18,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-10-04 18:53:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-04 18:53:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-04 18:53:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-10-04 18:53:18,933 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2021-10-04 18:53:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:18,933 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-10-04 18:53:18,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-10-04 18:53:18,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:18,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:18,934 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:18,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-04 18:53:19,147 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,SelfDestructingSolverStorable36 [2021-10-04 18:53:19,147 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:19,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1773301380, now seen corresponding path program 12 times [2021-10-04 18:53:19,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:19,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097451762] [2021-10-04 18:53:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:19,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:19,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:19,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097451762] [2021-10-04 18:53:19,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097451762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:19,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111960724] [2021-10-04 18:53:19,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:19,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:19,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:19,255 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) [2021-10-04 18:53:19,278 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 [2021-10-04 18:53:19,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:53:19,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:19,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111960724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:19,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:19,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 18:53:19,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962236454] [2021-10-04 18:53:19,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:19,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:19,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:19,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:19,941 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:20,183 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2021-10-04 18:53:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-04 18:53:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:20,185 INFO L225 Difference]: With dead ends: 132 [2021-10-04 18:53:20,186 INFO L226 Difference]: Without dead ends: 122 [2021-10-04 18:53:20,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:53:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-04 18:53:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-04 18:53:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-10-04 18:53:20,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 16 [2021-10-04 18:53:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:20,191 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-10-04 18:53:20,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-10-04 18:53:20,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:20,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:20,192 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:20,226 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 [2021-10-04 18:53:20,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-04 18:53:20,408 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash 416830752, now seen corresponding path program 13 times [2021-10-04 18:53:20,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:20,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123292431] [2021-10-04 18:53:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:20,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:20,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:20,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123292431] [2021-10-04 18:53:20,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123292431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:20,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431543761] [2021-10-04 18:53:20,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:20,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:20,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:20,527 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) [2021-10-04 18:53:20,531 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 [2021-10-04 18:53:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:21,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:21,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:21,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431543761] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:21,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:21,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 18:53:21,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929085220] [2021-10-04 18:53:21,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:21,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:21,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:21,242 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:21,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:21,511 INFO L93 Difference]: Finished difference Result 152 states and 304 transitions. [2021-10-04 18:53:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:53:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:21,513 INFO L225 Difference]: With dead ends: 152 [2021-10-04 18:53:21,513 INFO L226 Difference]: Without dead ends: 142 [2021-10-04 18:53:21,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-10-04 18:53:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-04 18:53:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2021-10-04 18:53:21,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 219 transitions. [2021-10-04 18:53:21,518 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 219 transitions. Word has length 16 [2021-10-04 18:53:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:21,519 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 219 transitions. [2021-10-04 18:53:21,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 219 transitions. [2021-10-04 18:53:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:21,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:21,520 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:21,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:21,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-04 18:53:21,733 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash 472242012, now seen corresponding path program 14 times [2021-10-04 18:53:21,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:21,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105161202] [2021-10-04 18:53:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:21,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:21,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:21,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105161202] [2021-10-04 18:53:21,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105161202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:21,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755193487] [2021-10-04 18:53:21,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:21,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:21,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:21,858 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) [2021-10-04 18:53:21,859 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 [2021-10-04 18:53:22,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:22,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:22,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:22,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755193487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:22,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:22,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 18:53:22,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204970370] [2021-10-04 18:53:22,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:22,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:22,605 INFO L87 Difference]: Start difference. First operand 96 states and 219 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:22,865 INFO L93 Difference]: Finished difference Result 136 states and 283 transitions. [2021-10-04 18:53:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:53:22,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:22,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:22,867 INFO L225 Difference]: With dead ends: 136 [2021-10-04 18:53:22,867 INFO L226 Difference]: Without dead ends: 126 [2021-10-04 18:53:22,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:53:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-04 18:53:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 92. [2021-10-04 18:53:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2021-10-04 18:53:22,870 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2021-10-04 18:53:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2021-10-04 18:53:22,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2021-10-04 18:53:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:22,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:22,872 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:22,905 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 [2021-10-04 18:53:23,080 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,SelfDestructingSolverStorable39 [2021-10-04 18:53:23,081 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1389237814, now seen corresponding path program 15 times [2021-10-04 18:53:23,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:23,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534065573] [2021-10-04 18:53:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:23,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:23,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:23,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534065573] [2021-10-04 18:53:23,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534065573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:23,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388754905] [2021-10-04 18:53:23,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:23,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:23,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:23,187 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) [2021-10-04 18:53:23,203 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 [2021-10-04 18:53:23,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 18:53:23,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:23,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388754905] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:23,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:23,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 18:53:23,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165552776] [2021-10-04 18:53:23,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:23,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:23,890 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:24,161 INFO L93 Difference]: Finished difference Result 140 states and 296 transitions. [2021-10-04 18:53:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:53:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:24,162 INFO L225 Difference]: With dead ends: 140 [2021-10-04 18:53:24,162 INFO L226 Difference]: Without dead ends: 122 [2021-10-04 18:53:24,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-10-04 18:53:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-04 18:53:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2021-10-04 18:53:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 103 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2021-10-04 18:53:24,175 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 16 [2021-10-04 18:53:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:24,176 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2021-10-04 18:53:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2021-10-04 18:53:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:24,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:24,180 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:24,249 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 [2021-10-04 18:53:24,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:24,381 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1190359006, now seen corresponding path program 16 times [2021-10-04 18:53:24,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:24,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864418270] [2021-10-04 18:53:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:24,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:24,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864418270] [2021-10-04 18:53:24,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864418270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:24,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216809490] [2021-10-04 18:53:24,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:24,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:24,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:24,509 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) [2021-10-04 18:53:24,510 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 [2021-10-04 18:53:25,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:25,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:25,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216809490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:25,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:25,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-04 18:53:25,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371288105] [2021-10-04 18:53:25,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 18:53:25,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:25,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 18:53:25,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-04 18:53:25,265 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:25,570 INFO L93 Difference]: Finished difference Result 174 states and 352 transitions. [2021-10-04 18:53:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:53:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:25,572 INFO L225 Difference]: With dead ends: 174 [2021-10-04 18:53:25,572 INFO L226 Difference]: Without dead ends: 160 [2021-10-04 18:53:25,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-04 18:53:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-04 18:53:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-10-04 18:53:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.3333333333333335) internal successors, (259), 111 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 259 transitions. [2021-10-04 18:53:25,577 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 259 transitions. Word has length 16 [2021-10-04 18:53:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:25,577 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 259 transitions. [2021-10-04 18:53:25,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 259 transitions. [2021-10-04 18:53:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:25,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:25,578 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:25,614 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 [2021-10-04 18:53:25,793 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,SelfDestructingSolverStorable41 [2021-10-04 18:53:25,794 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1134947746, now seen corresponding path program 17 times [2021-10-04 18:53:25,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:25,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662941585] [2021-10-04 18:53:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:25,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:25,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:25,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662941585] [2021-10-04 18:53:25,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662941585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:25,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977963103] [2021-10-04 18:53:25,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:25,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:25,917 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) [2021-10-04 18:53:25,918 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 [2021-10-04 18:53:26,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:26,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-04 18:53:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:26,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977963103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:26,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:26,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-04 18:53:26,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959565800] [2021-10-04 18:53:26,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:26,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:26,732 INFO L87 Difference]: Start difference. First operand 112 states and 259 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:27,098 INFO L93 Difference]: Finished difference Result 158 states and 332 transitions. [2021-10-04 18:53:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:53:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:27,101 INFO L225 Difference]: With dead ends: 158 [2021-10-04 18:53:27,101 INFO L226 Difference]: Without dead ends: 148 [2021-10-04 18:53:27,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-10-04 18:53:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-04 18:53:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-10-04 18:53:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 101 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 227 transitions. [2021-10-04 18:53:27,106 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 227 transitions. Word has length 16 [2021-10-04 18:53:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:27,106 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 227 transitions. [2021-10-04 18:53:27,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 227 transitions. [2021-10-04 18:53:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:27,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:27,107 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:27,136 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 [2021-10-04 18:53:27,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:27,321 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:27,322 INFO L82 PathProgramCache]: Analyzing trace with hash 441303228, now seen corresponding path program 18 times [2021-10-04 18:53:27,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:27,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728502568] [2021-10-04 18:53:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:27,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:27,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:27,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728502568] [2021-10-04 18:53:27,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728502568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:27,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386468906] [2021-10-04 18:53:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:27,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:27,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:27,445 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) [2021-10-04 18:53:27,462 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 [2021-10-04 18:53:28,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:53:28,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:28,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386468906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:28,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:28,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:28,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068628698] [2021-10-04 18:53:28,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:28,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:28,234 INFO L87 Difference]: Start difference. First operand 102 states and 227 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:28,446 INFO L93 Difference]: Finished difference Result 142 states and 293 transitions. [2021-10-04 18:53:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 18:53:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:28,448 INFO L225 Difference]: With dead ends: 142 [2021-10-04 18:53:28,448 INFO L226 Difference]: Without dead ends: 132 [2021-10-04 18:53:28,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-04 18:53:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-10-04 18:53:28,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 103 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2021-10-04 18:53:28,453 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 16 [2021-10-04 18:53:28,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:28,453 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2021-10-04 18:53:28,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2021-10-04 18:53:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:28,454 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:28,454 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:28,481 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 [2021-10-04 18:53:28,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-04 18:53:28,656 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1663531936, now seen corresponding path program 19 times [2021-10-04 18:53:28,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:28,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661292297] [2021-10-04 18:53:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:28,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:28,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:28,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661292297] [2021-10-04 18:53:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661292297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:28,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921502187] [2021-10-04 18:53:28,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:28,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:28,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:28,775 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) [2021-10-04 18:53:28,776 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 [2021-10-04 18:53:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:29,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:29,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921502187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:29,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:29,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:29,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420208836] [2021-10-04 18:53:29,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:29,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:29,566 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:29,768 INFO L93 Difference]: Finished difference Result 174 states and 348 transitions. [2021-10-04 18:53:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:29,770 INFO L225 Difference]: With dead ends: 174 [2021-10-04 18:53:29,771 INFO L226 Difference]: Without dead ends: 160 [2021-10-04 18:53:29,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-04 18:53:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 108. [2021-10-04 18:53:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.308411214953271) internal successors, (247), 107 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 247 transitions. [2021-10-04 18:53:29,787 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 247 transitions. Word has length 16 [2021-10-04 18:53:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:29,787 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 247 transitions. [2021-10-04 18:53:29,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 247 transitions. [2021-10-04 18:53:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:29,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:29,789 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:29,819 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 [2021-10-04 18:53:30,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:30,004 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1608120676, now seen corresponding path program 20 times [2021-10-04 18:53:30,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:30,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560974036] [2021-10-04 18:53:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:30,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:30,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:30,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560974036] [2021-10-04 18:53:30,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560974036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:30,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738385209] [2021-10-04 18:53:30,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:30,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:30,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:30,128 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) [2021-10-04 18:53:30,129 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 [2021-10-04 18:53:30,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:30,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:30,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:30,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738385209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:30,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:30,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:30,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813759366] [2021-10-04 18:53:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:30,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:30,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:30,933 INFO L87 Difference]: Start difference. First operand 108 states and 247 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:31,152 INFO L93 Difference]: Finished difference Result 154 states and 321 transitions. [2021-10-04 18:53:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:31,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:31,154 INFO L225 Difference]: With dead ends: 154 [2021-10-04 18:53:31,154 INFO L226 Difference]: Without dead ends: 144 [2021-10-04 18:53:31,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-04 18:53:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 94. [2021-10-04 18:53:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.182795698924731) internal successors, (203), 93 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 203 transitions. [2021-10-04 18:53:31,158 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 203 transitions. Word has length 16 [2021-10-04 18:53:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:31,159 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 203 transitions. [2021-10-04 18:53:31,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 203 transitions. [2021-10-04 18:53:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:31,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:31,160 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:31,192 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 [2021-10-04 18:53:31,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:31,374 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash -71998474, now seen corresponding path program 21 times [2021-10-04 18:53:31,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:31,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611070388] [2021-10-04 18:53:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:31,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:31,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:31,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611070388] [2021-10-04 18:53:31,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611070388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:31,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039130659] [2021-10-04 18:53:31,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:31,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:31,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:31,511 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) [2021-10-04 18:53:31,512 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 [2021-10-04 18:53:32,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 18:53:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:32,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039130659] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:32,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:32,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:32,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757511290] [2021-10-04 18:53:32,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:32,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:32,332 INFO L87 Difference]: Start difference. First operand 94 states and 203 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:32,580 INFO L93 Difference]: Finished difference Result 128 states and 265 transitions. [2021-10-04 18:53:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:32,582 INFO L225 Difference]: With dead ends: 128 [2021-10-04 18:53:32,582 INFO L226 Difference]: Without dead ends: 112 [2021-10-04 18:53:32,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-04 18:53:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2021-10-04 18:53:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 217 transitions. [2021-10-04 18:53:32,586 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 217 transitions. Word has length 16 [2021-10-04 18:53:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 217 transitions. [2021-10-04 18:53:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 217 transitions. [2021-10-04 18:53:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:32,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:32,588 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:32,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:32,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-04 18:53:32,803 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1643372002, now seen corresponding path program 22 times [2021-10-04 18:53:32,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:32,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701147609] [2021-10-04 18:53:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:32,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:32,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:32,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701147609] [2021-10-04 18:53:32,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701147609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:32,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506223614] [2021-10-04 18:53:32,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:32,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:32,931 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) [2021-10-04 18:53:32,958 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 [2021-10-04 18:53:33,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:33,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506223614] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:33,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:33,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689830167] [2021-10-04 18:53:33,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:33,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:33,747 INFO L87 Difference]: Start difference. First operand 98 states and 217 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:34,002 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-10-04 18:53:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:34,004 INFO L225 Difference]: With dead ends: 164 [2021-10-04 18:53:34,004 INFO L226 Difference]: Without dead ends: 150 [2021-10-04 18:53:34,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-04 18:53:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2021-10-04 18:53:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3047619047619046) internal successors, (242), 105 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 242 transitions. [2021-10-04 18:53:34,008 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 242 transitions. Word has length 16 [2021-10-04 18:53:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:34,008 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 242 transitions. [2021-10-04 18:53:34,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 242 transitions. [2021-10-04 18:53:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:34,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:34,009 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:34,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:34,209 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,SelfDestructingSolverStorable47 [2021-10-04 18:53:34,210 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:34,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1698783262, now seen corresponding path program 23 times [2021-10-04 18:53:34,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:34,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812749454] [2021-10-04 18:53:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:34,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:34,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:34,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812749454] [2021-10-04 18:53:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812749454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:34,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712124403] [2021-10-04 18:53:34,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:34,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:34,333 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) [2021-10-04 18:53:34,335 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 [2021-10-04 18:53:34,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:34,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-04 18:53:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:35,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712124403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:35,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:35,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-04 18:53:35,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018012213] [2021-10-04 18:53:35,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:35,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:35,210 INFO L87 Difference]: Start difference. First operand 106 states and 242 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:35,541 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-10-04 18:53:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-04 18:53:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:35,544 INFO L225 Difference]: With dead ends: 148 [2021-10-04 18:53:35,544 INFO L226 Difference]: Without dead ends: 138 [2021-10-04 18:53:35,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-10-04 18:53:35,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-04 18:53:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2021-10-04 18:53:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 214 transitions. [2021-10-04 18:53:35,550 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 214 transitions. Word has length 16 [2021-10-04 18:53:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:35,550 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 214 transitions. [2021-10-04 18:53:35,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 214 transitions. [2021-10-04 18:53:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:35,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:35,551 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:35,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-04 18:53:35,764 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,SelfDestructingSolverStorable48 [2021-10-04 18:53:35,765 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:35,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:35,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1420500810, now seen corresponding path program 24 times [2021-10-04 18:53:35,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:35,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839101343] [2021-10-04 18:53:35,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:35,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:35,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:35,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839101343] [2021-10-04 18:53:35,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839101343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:35,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981015677] [2021-10-04 18:53:35,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:35,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:35,881 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) [2021-10-04 18:53:35,887 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 [2021-10-04 18:53:36,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-04 18:53:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:36,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:36,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981015677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:36,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:36,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:36,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042971139] [2021-10-04 18:53:36,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:36,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:36,704 INFO L87 Difference]: Start difference. First operand 96 states and 214 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:36,905 INFO L93 Difference]: Finished difference Result 136 states and 280 transitions. [2021-10-04 18:53:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 18:53:36,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:36,907 INFO L225 Difference]: With dead ends: 136 [2021-10-04 18:53:36,907 INFO L226 Difference]: Without dead ends: 126 [2021-10-04 18:53:36,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-04 18:53:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-10-04 18:53:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2783505154639174) internal successors, (221), 97 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 221 transitions. [2021-10-04 18:53:36,928 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 221 transitions. Word has length 16 [2021-10-04 18:53:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:36,929 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 221 transitions. [2021-10-04 18:53:36,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 221 transitions. [2021-10-04 18:53:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:36,929 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:36,929 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:36,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-04 18:53:37,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:37,131 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 769631322, now seen corresponding path program 25 times [2021-10-04 18:53:37,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:37,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920977866] [2021-10-04 18:53:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:37,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:37,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:37,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920977866] [2021-10-04 18:53:37,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920977866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:37,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013218861] [2021-10-04 18:53:37,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:37,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:37,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:37,273 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) [2021-10-04 18:53:37,274 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 [2021-10-04 18:53:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:37,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:37,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:38,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013218861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:38,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:38,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:38,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859602907] [2021-10-04 18:53:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:38,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:38,118 INFO L87 Difference]: Start difference. First operand 98 states and 221 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:38,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:38,329 INFO L93 Difference]: Finished difference Result 168 states and 335 transitions. [2021-10-04 18:53:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:38,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:38,332 INFO L225 Difference]: With dead ends: 168 [2021-10-04 18:53:38,332 INFO L226 Difference]: Without dead ends: 154 [2021-10-04 18:53:38,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-04 18:53:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 102. [2021-10-04 18:53:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3168316831683167) internal successors, (234), 101 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 234 transitions. [2021-10-04 18:53:38,336 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 234 transitions. Word has length 16 [2021-10-04 18:53:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:38,337 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 234 transitions. [2021-10-04 18:53:38,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 234 transitions. [2021-10-04 18:53:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-04 18:53:38,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:38,338 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:38,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-04 18:53:38,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:38,554 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash 825042582, now seen corresponding path program 26 times [2021-10-04 18:53:38,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:38,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624948444] [2021-10-04 18:53:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:38,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:38,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:38,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624948444] [2021-10-04 18:53:38,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624948444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:38,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774424257] [2021-10-04 18:53:38,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:38,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:38,705 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) [2021-10-04 18:53:38,706 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 [2021-10-04 18:53:39,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:39,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:39,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 18:53:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:39,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774424257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:39,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:39,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 18:53:39,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774985283] [2021-10-04 18:53:39,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-04 18:53:39,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-04 18:53:39,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-04 18:53:39,565 INFO L87 Difference]: Start difference. First operand 102 states and 234 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:39,794 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-10-04 18:53:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 16 [2021-10-04 18:53:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:39,796 INFO L225 Difference]: With dead ends: 148 [2021-10-04 18:53:39,796 INFO L226 Difference]: Without dead ends: 138 [2021-10-04 18:53:39,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:53:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-04 18:53:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 86. [2021-10-04 18:53:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 187 transitions. [2021-10-04 18:53:39,801 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 187 transitions. Word has length 16 [2021-10-04 18:53:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:39,801 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 187 transitions. [2021-10-04 18:53:39,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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) [2021-10-04 18:53:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 187 transitions. [2021-10-04 18:53:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:39,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:39,802 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:39,845 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 [2021-10-04 18:53:40,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:40,017 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 348525074, now seen corresponding path program 27 times [2021-10-04 18:53:40,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:40,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792327900] [2021-10-04 18:53:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:40,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:40,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:40,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792327900] [2021-10-04 18:53:40,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792327900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:40,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626438530] [2021-10-04 18:53:40,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:40,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:40,134 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) [2021-10-04 18:53:40,152 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 [2021-10-04 18:53:40,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-04 18:53:40,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:41,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626438530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:41,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:41,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707713410] [2021-10-04 18:53:41,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:41,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:41,061 INFO L87 Difference]: Start difference. First operand 86 states and 187 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:41,386 INFO L93 Difference]: Finished difference Result 120 states and 241 transitions. [2021-10-04 18:53:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-04 18:53:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:41,388 INFO L225 Difference]: With dead ends: 120 [2021-10-04 18:53:41,388 INFO L226 Difference]: Without dead ends: 74 [2021-10-04 18:53:41,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-10-04 18:53:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-04 18:53:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-04 18:53:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 73 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 161 transitions. [2021-10-04 18:53:41,391 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 161 transitions. Word has length 17 [2021-10-04 18:53:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:41,391 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 161 transitions. [2021-10-04 18:53:41,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 161 transitions. [2021-10-04 18:53:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:41,392 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:41,393 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:41,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:41,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:41,608 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash 862794770, now seen corresponding path program 28 times [2021-10-04 18:53:41,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:41,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137717606] [2021-10-04 18:53:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:41,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:41,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:41,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137717606] [2021-10-04 18:53:41,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137717606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:41,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693915202] [2021-10-04 18:53:41,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:41,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:41,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:41,732 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) [2021-10-04 18:53:41,733 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 [2021-10-04 18:53:42,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:42,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693915202] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:42,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:42,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:42,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682327492] [2021-10-04 18:53:42,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:42,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:42,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:42,714 INFO L87 Difference]: Start difference. First operand 74 states and 161 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:43,076 INFO L93 Difference]: Finished difference Result 114 states and 234 transitions. [2021-10-04 18:53:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:53:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:43,078 INFO L225 Difference]: With dead ends: 114 [2021-10-04 18:53:43,078 INFO L226 Difference]: Without dead ends: 80 [2021-10-04 18:53:43,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-10-04 18:53:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-04 18:53:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-04 18:53:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2021-10-04 18:53:43,080 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 17 [2021-10-04 18:53:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:43,080 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2021-10-04 18:53:43,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2021-10-04 18:53:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:43,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:43,081 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:43,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:43,282 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,SelfDestructingSolverStorable53 [2021-10-04 18:53:43,282 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:43,283 INFO L82 PathProgramCache]: Analyzing trace with hash 908800876, now seen corresponding path program 29 times [2021-10-04 18:53:43,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:43,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482922634] [2021-10-04 18:53:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:43,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:43,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:43,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482922634] [2021-10-04 18:53:43,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482922634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:43,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121851446] [2021-10-04 18:53:43,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:43,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:43,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:43,397 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) [2021-10-04 18:53:43,423 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 [2021-10-04 18:53:44,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:44,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:44,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:44,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121851446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:44,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:44,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:44,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237317520] [2021-10-04 18:53:44,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:44,327 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:44,712 INFO L93 Difference]: Finished difference Result 140 states and 287 transitions. [2021-10-04 18:53:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 18:53:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:44,713 INFO L225 Difference]: With dead ends: 140 [2021-10-04 18:53:44,714 INFO L226 Difference]: Without dead ends: 114 [2021-10-04 18:53:44,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-10-04 18:53:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-04 18:53:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2021-10-04 18:53:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 85 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) [2021-10-04 18:53:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 195 transitions. [2021-10-04 18:53:44,717 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 195 transitions. Word has length 17 [2021-10-04 18:53:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:44,718 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 195 transitions. [2021-10-04 18:53:44,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 195 transitions. [2021-10-04 18:53:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:44,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:44,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:44,747 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 [2021-10-04 18:53:44,919 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,SelfDestructingSolverStorable54 [2021-10-04 18:53:44,920 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1196034288, now seen corresponding path program 30 times [2021-10-04 18:53:44,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:44,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347114991] [2021-10-04 18:53:44,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:44,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:45,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:45,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347114991] [2021-10-04 18:53:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347114991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:45,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228662664] [2021-10-04 18:53:45,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:45,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:45,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:45,057 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) [2021-10-04 18:53:45,059 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 [2021-10-04 18:53:45,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 18:53:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:46,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228662664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:46,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:46,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:46,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552503772] [2021-10-04 18:53:46,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:46,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:46,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:46,034 INFO L87 Difference]: Start difference. First operand 86 states and 195 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:46,441 INFO L93 Difference]: Finished difference Result 124 states and 247 transitions. [2021-10-04 18:53:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:53:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:46,442 INFO L225 Difference]: With dead ends: 124 [2021-10-04 18:53:46,442 INFO L226 Difference]: Without dead ends: 114 [2021-10-04 18:53:46,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-04 18:53:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-04 18:53:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 90. [2021-10-04 18:53:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 205 transitions. [2021-10-04 18:53:46,446 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 205 transitions. Word has length 17 [2021-10-04 18:53:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:46,446 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 205 transitions. [2021-10-04 18:53:46,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 205 transitions. [2021-10-04 18:53:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:46,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:46,448 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:46,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:46,656 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,SelfDestructingSolverStorable55 [2021-10-04 18:53:46,657 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:46,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1140623028, now seen corresponding path program 31 times [2021-10-04 18:53:46,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:46,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658744523] [2021-10-04 18:53:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:46,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:46,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:46,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658744523] [2021-10-04 18:53:46,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658744523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:46,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211346859] [2021-10-04 18:53:46,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:46,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:46,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:46,801 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) [2021-10-04 18:53:46,830 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 [2021-10-04 18:53:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:47,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211346859] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:47,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:47,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:47,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156410400] [2021-10-04 18:53:47,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:47,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:47,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:47,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:47,791 INFO L87 Difference]: Start difference. First operand 90 states and 205 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:48,188 INFO L93 Difference]: Finished difference Result 112 states and 233 transitions. [2021-10-04 18:53:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:53:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:48,190 INFO L225 Difference]: With dead ends: 112 [2021-10-04 18:53:48,190 INFO L226 Difference]: Without dead ends: 94 [2021-10-04 18:53:48,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-04 18:53:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-04 18:53:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-04 18:53:48,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.258426966292135) internal successors, (201), 89 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 201 transitions. [2021-10-04 18:53:48,193 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 201 transitions. Word has length 17 [2021-10-04 18:53:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:48,193 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 201 transitions. [2021-10-04 18:53:48,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 201 transitions. [2021-10-04 18:53:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:48,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:48,194 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:48,220 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 [2021-10-04 18:53:48,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:48,395 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1669441366, now seen corresponding path program 32 times [2021-10-04 18:53:48,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:48,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805328109] [2021-10-04 18:53:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:48,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:48,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:48,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805328109] [2021-10-04 18:53:48,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805328109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:48,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154142401] [2021-10-04 18:53:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:48,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:48,517 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) [2021-10-04 18:53:48,550 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 [2021-10-04 18:53:49,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:49,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:49,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154142401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:49,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:49,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:49,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157854135] [2021-10-04 18:53:49,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:49,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:49,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:49,514 INFO L87 Difference]: Start difference. First operand 90 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:49,998 INFO L93 Difference]: Finished difference Result 206 states and 435 transitions. [2021-10-04 18:53:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-04 18:53:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:50,000 INFO L225 Difference]: With dead ends: 206 [2021-10-04 18:53:50,000 INFO L226 Difference]: Without dead ends: 156 [2021-10-04 18:53:50,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 18:53:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-04 18:53:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-10-04 18:53:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-04 18:53:50,008 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-04 18:53:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:50,008 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-04 18:53:50,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:50,008 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-04 18:53:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:50,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:50,009 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:50,038 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 [2021-10-04 18:53:50,214 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,SelfDestructingSolverStorable57 [2021-10-04 18:53:50,215 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash 520690766, now seen corresponding path program 33 times [2021-10-04 18:53:50,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:50,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387364480] [2021-10-04 18:53:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:50,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:50,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:50,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387364480] [2021-10-04 18:53:50,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387364480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:50,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6945831] [2021-10-04 18:53:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:53:50,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:50,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:50,355 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:53:50,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-04 18:53:51,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 18:53:51,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:51,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:51,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6945831] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:51,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:51,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194948693] [2021-10-04 18:53:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:51,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:51,355 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:51,827 INFO L93 Difference]: Finished difference Result 188 states and 386 transitions. [2021-10-04 18:53:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 18:53:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:51,829 INFO L225 Difference]: With dead ends: 188 [2021-10-04 18:53:51,829 INFO L226 Difference]: Without dead ends: 178 [2021-10-04 18:53:51,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-10-04 18:53:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-04 18:53:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 122. [2021-10-04 18:53:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.3884297520661155) internal successors, (289), 121 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 289 transitions. [2021-10-04 18:53:51,833 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 289 transitions. Word has length 17 [2021-10-04 18:53:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:51,833 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 289 transitions. [2021-10-04 18:53:51,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 289 transitions. [2021-10-04 18:53:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:51,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:51,834 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:51,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:52,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:52,035 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:52,036 INFO L82 PathProgramCache]: Analyzing trace with hash 576102026, now seen corresponding path program 34 times [2021-10-04 18:53:52,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:52,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044507943] [2021-10-04 18:53:52,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:52,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:52,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:52,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044507943] [2021-10-04 18:53:52,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044507943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:52,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735771212] [2021-10-04 18:53:52,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:53:52,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:52,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:52,187 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:53:52,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-04 18:53:52,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:53:52,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:52,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:53,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735771212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:53,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:53,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 18:53:53,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269344464] [2021-10-04 18:53:53,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 18:53:53,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:53,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 18:53:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-10-04 18:53:53,191 INFO L87 Difference]: Start difference. First operand 122 states and 289 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:53,632 INFO L93 Difference]: Finished difference Result 174 states and 369 transitions. [2021-10-04 18:53:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 18:53:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-04 18:53:53,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:53,634 INFO L225 Difference]: With dead ends: 174 [2021-10-04 18:53:53,634 INFO L226 Difference]: Without dead ends: 156 [2021-10-04 18:53:53,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-10-04 18:53:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-04 18:53:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-10-04 18:53:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-04 18:53:53,637 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-04 18:53:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:53,637 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-04 18:53:53,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-04 18:53:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:53,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:53,638 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:53,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:53,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-04 18:53:53,839 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:53,840 INFO L82 PathProgramCache]: Analyzing trace with hash 276873962, now seen corresponding path program 35 times [2021-10-04 18:53:53,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:53,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590433099] [2021-10-04 18:53:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:53,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:53,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:53,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590433099] [2021-10-04 18:53:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590433099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:53,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668506432] [2021-10-04 18:53:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:53:53,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:53,955 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:53:53,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-04 18:53:54,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:53:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-04 18:53:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:55,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668506432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:55,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:55,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-04 18:53:55,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942884451] [2021-10-04 18:53:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 18:53:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 18:53:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-10-04 18:53:55,025 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-04 18:53:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:55,497 INFO L93 Difference]: Finished difference Result 170 states and 350 transitions. [2021-10-04 18:53:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 18:53:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 17 [2021-10-04 18:53:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:55,499 INFO L225 Difference]: With dead ends: 170 [2021-10-04 18:53:55,499 INFO L226 Difference]: Without dead ends: 120 [2021-10-04 18:53:55,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-10-04 18:53:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-04 18:53:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 88. [2021-10-04 18:53:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-10-04 18:53:55,503 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-10-04 18:53:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:55,504 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-10-04 18:53:55,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-04 18:53:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-10-04 18:53:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:55,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:55,505 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:55,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-04 18:53:55,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:55,719 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1827961202, now seen corresponding path program 36 times [2021-10-04 18:53:55,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:55,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721313667] [2021-10-04 18:53:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:55,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:55,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:55,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721313667] [2021-10-04 18:53:55,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721313667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:55,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266196891] [2021-10-04 18:53:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 18:53:55,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:55,844 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:53:55,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-04 18:53:56,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-04 18:53:56,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:53:56,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-04 18:53:56,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266196891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:56,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:56,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-04 18:53:56,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270795386] [2021-10-04 18:53:56,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 18:53:56,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:56,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 18:53:56,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-10-04 18:53:56,934 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-04 18:53:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:57,358 INFO L93 Difference]: Finished difference Result 134 states and 265 transitions. [2021-10-04 18:53:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:57,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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 17 [2021-10-04 18:53:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:57,360 INFO L225 Difference]: With dead ends: 134 [2021-10-04 18:53:57,360 INFO L226 Difference]: Without dead ends: 124 [2021-10-04 18:53:57,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 496.9ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-10-04 18:53:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-04 18:53:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-10-04 18:53:57,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2021-10-04 18:53:57,364 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 17 [2021-10-04 18:53:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:57,364 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2021-10-04 18:53:57,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 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) [2021-10-04 18:53:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2021-10-04 18:53:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-04 18:53:57,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:57,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:57,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-04 18:53:57,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:57,574 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1772549942, now seen corresponding path program 37 times [2021-10-04 18:53:57,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:57,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923888340] [2021-10-04 18:53:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:57,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:57,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:57,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923888340] [2021-10-04 18:53:57,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923888340] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:57,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764758186] [2021-10-04 18:53:57,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 18:53:57,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:57,714 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:53:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-04 18:53:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 18:53:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:53:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:58,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764758186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:58,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:53:58,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-04 18:53:58,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99642798] [2021-10-04 18:53:58,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-04 18:53:58,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:53:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-04 18:53:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-04 18:53:58,752 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-10-04 18:53:59,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:53:59,108 INFO L93 Difference]: Finished difference Result 122 states and 251 transitions. [2021-10-04 18:53:59,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 18:53:59,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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 17 [2021-10-04 18:53:59,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:53:59,110 INFO L225 Difference]: With dead ends: 122 [2021-10-04 18:53:59,110 INFO L226 Difference]: Without dead ends: 104 [2021-10-04 18:53:59,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-10-04 18:53:59,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-04 18:53:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 70. [2021-10-04 18:53:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2318840579710146) internal successors, (154), 69 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:53:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 154 transitions. [2021-10-04 18:53:59,113 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 154 transitions. Word has length 17 [2021-10-04 18:53:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:53:59,114 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 154 transitions. [2021-10-04 18:53:59,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-10-04 18:53:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 154 transitions. [2021-10-04 18:53:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:53:59,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:53:59,115 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:53:59,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-04 18:53:59,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:59,324 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:53:59,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:53:59,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2115566024, now seen corresponding path program 38 times [2021-10-04 18:53:59,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:53:59,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646406285] [2021-10-04 18:53:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:53:59,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:53:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:53:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:53:59,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:53:59,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646406285] [2021-10-04 18:53:59,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646406285] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:53:59,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348065450] [2021-10-04 18:53:59,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 18:53:59,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:53:59,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:53:59,465 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:53:59,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-04 18:54:00,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 18:54:00,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:54:00,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 18:54:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:54:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:00,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348065450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:00,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:54:00,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-04 18:54:00,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71816134] [2021-10-04 18:54:00,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 18:54:00,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:54:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 18:54:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-04 18:54:00,450 INFO L87 Difference]: Start difference. First operand 70 states and 154 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:54:00,813 INFO L93 Difference]: Finished difference Result 118 states and 241 transitions. [2021-10-04 18:54:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 18:54:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-04 18:54:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:54:00,814 INFO L225 Difference]: With dead ends: 118 [2021-10-04 18:54:00,814 INFO L226 Difference]: Without dead ends: 78 [2021-10-04 18:54:00,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-10-04 18:54:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-04 18:54:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-04 18:54:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 139 transitions. [2021-10-04 18:54:00,818 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 139 transitions. Word has length 18 [2021-10-04 18:54:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:54:00,818 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 139 transitions. [2021-10-04 18:54:00,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 139 transitions. [2021-10-04 18:54:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:54:00,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:54:00,819 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:54:00,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-10-04 18:54:01,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:54:01,020 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:54:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:54:01,021 INFO L82 PathProgramCache]: Analyzing trace with hash -400195548, now seen corresponding path program 39 times [2021-10-04 18:54:01,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:54:01,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006696899] [2021-10-04 18:54:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:54:01,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:54:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:54:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:01,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:54:01,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006696899] [2021-10-04 18:54:01,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006696899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:01,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491641862] [2021-10-04 18:54:01,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 18:54:01,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:54:01,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:54:01,147 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:54:01,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-04 18:54:01,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-04 18:54:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:54:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 18:54:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:54:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:02,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491641862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:02,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:54:02,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-04 18:54:02,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034950385] [2021-10-04 18:54:02,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 18:54:02,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:54:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 18:54:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-04 18:54:02,271 INFO L87 Difference]: Start difference. First operand 72 states and 139 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:54:02,597 INFO L93 Difference]: Finished difference Result 102 states and 174 transitions. [2021-10-04 18:54:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:54:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-04 18:54:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:54:02,599 INFO L225 Difference]: With dead ends: 102 [2021-10-04 18:54:02,599 INFO L226 Difference]: Without dead ends: 88 [2021-10-04 18:54:02,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-10-04 18:54:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-04 18:54:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-04 18:54:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9420289855072463) internal successors, (134), 69 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 134 transitions. [2021-10-04 18:54:02,601 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 134 transitions. Word has length 18 [2021-10-04 18:54:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:54:02,602 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 134 transitions. [2021-10-04 18:54:02,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 134 transitions. [2021-10-04 18:54:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:54:02,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:54:02,602 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:54:02,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-04 18:54:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-04 18:54:02,803 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:54:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:54:02,804 INFO L82 PathProgramCache]: Analyzing trace with hash -344784288, now seen corresponding path program 40 times [2021-10-04 18:54:02,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:54:02,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299968446] [2021-10-04 18:54:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:54:02,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:54:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:54:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:02,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:54:02,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299968446] [2021-10-04 18:54:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299968446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:02,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716849592] [2021-10-04 18:54:02,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 18:54:02,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:54:02,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:54:02,934 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:54:02,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-04 18:54:03,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 18:54:03,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:54:03,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 18:54:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:54:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:04,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716849592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:04,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:54:04,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-04 18:54:04,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206266433] [2021-10-04 18:54:04,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 18:54:04,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:54:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 18:54:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-04 18:54:04,046 INFO L87 Difference]: Start difference. First operand 70 states and 134 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:54:04,386 INFO L93 Difference]: Finished difference Result 86 states and 154 transitions. [2021-10-04 18:54:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-04 18:54:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-04 18:54:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:54:04,387 INFO L225 Difference]: With dead ends: 86 [2021-10-04 18:54:04,388 INFO L226 Difference]: Without dead ends: 36 [2021-10-04 18:54:04,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-10-04 18:54:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-04 18:54:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-04 18:54:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 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) [2021-10-04 18:54:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-10-04 18:54:04,390 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 18 [2021-10-04 18:54:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:54:04,390 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-10-04 18:54:04,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:04,390 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-10-04 18:54:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-04 18:54:04,391 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 18:54:04,391 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 18:54:04,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-04 18:54:04,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:54:04,592 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-04 18:54:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 18:54:04,592 INFO L82 PathProgramCache]: Analyzing trace with hash -230463878, now seen corresponding path program 41 times [2021-10-04 18:54:04,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 18:54:04,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590364296] [2021-10-04 18:54:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 18:54:04,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 18:54:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 18:54:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:04,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 18:54:04,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590364296] [2021-10-04 18:54:04,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590364296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:04,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521183384] [2021-10-04 18:54:04,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 18:54:04,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 18:54:04,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 18:54:04,733 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 18:54:04,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-04 18:54:05,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-04 18:54:05,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 18:54:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-04 18:54:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 18:54:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 18:54:05,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521183384] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 18:54:05,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 18:54:05,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-10-04 18:54:05,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131956025] [2021-10-04 18:54:05,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 18:54:05,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 18:54:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 18:54:05,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-10-04 18:54:05,909 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2021-10-04 18:54:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 18:54:06,262 INFO L93 Difference]: Finished difference Result 48 states and 87 transitions. [2021-10-04 18:54:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 18:54:06,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 18 [2021-10-04 18:54:06,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 18:54:06,262 INFO L225 Difference]: With dead ends: 48 [2021-10-04 18:54:06,263 INFO L226 Difference]: Without dead ends: 0 [2021-10-04 18:54:06,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-10-04 18:54:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-04 18:54:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-04 18:54:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 18:54:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-04 18:54:06,263 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-04 18:54:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 18:54:06,264 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-04 18:54:06,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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) [2021-10-04 18:54:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-04 18:54:06,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-04 18:54:06,266 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 18:54:06,267 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 18:54:06,267 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 18:54:06,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-04 18:54:06,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-04 18:54:06,473 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 18:54:06,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 18:54:06,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 06:54:06 BasicIcfg [2021-10-04 18:54:06,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 18:54:06,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 18:54:06,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 18:54:06,476 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 18:54:06,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 06:52:41" (3/4) ... [2021-10-04 18:54:06,479 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-04 18:54:06,484 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-04 18:54:06,484 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-04 18:54:06,491 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-04 18:54:06,491 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 18:54:06,491 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 18:54:06,529 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 18:54:06,533 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 18:54:06,535 INFO L168 Benchmark]: Toolchain (without parser) took 86295.22 ms. Allocated memory was 65.0 MB in the beginning and 362.8 MB in the end (delta: 297.8 MB). Free memory was 40.9 MB in the beginning and 100.5 MB in the end (delta: -59.6 MB). Peak memory consumption was 238.4 MB. Max. memory is 16.1 GB. [2021-10-04 18:54:06,536 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 23.2 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 18:54:06,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.55 ms. Allocated memory is still 65.0 MB. Free memory was 40.6 MB in the beginning and 46.1 MB in the end (delta: -5.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-04 18:54:06,537 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.05 ms. Allocated memory is still 65.0 MB. Free memory was 45.9 MB in the beginning and 44.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 18:54:06,538 INFO L168 Benchmark]: Boogie Preprocessor took 36.98 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 43.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-04 18:54:06,539 INFO L168 Benchmark]: RCFGBuilder took 561.03 ms. Allocated memory is still 65.0 MB. Free memory was 43.2 MB in the beginning and 46.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-10-04 18:54:06,539 INFO L168 Benchmark]: TraceAbstraction took 85286.10 ms. Allocated memory was 65.0 MB in the beginning and 362.8 MB in the end (delta: 297.8 MB). Free memory was 45.4 MB in the beginning and 102.6 MB in the end (delta: -57.1 MB). Peak memory consumption was 239.4 MB. Max. memory is 16.1 GB. [2021-10-04 18:54:06,540 INFO L168 Benchmark]: Witness Printer took 57.71 ms. Allocated memory is still 362.8 MB. Free memory was 102.6 MB in the beginning and 100.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 18:54:06,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 46.1 MB. Free memory was 23.3 MB in the beginning and 23.2 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.55 ms. Allocated memory is still 65.0 MB. Free memory was 40.6 MB in the beginning and 46.1 MB in the end (delta: -5.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.05 ms. Allocated memory is still 65.0 MB. Free memory was 45.9 MB in the beginning and 44.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.98 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 43.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 561.03 ms. Allocated memory is still 65.0 MB. Free memory was 43.2 MB in the beginning and 46.0 MB in the end (delta: -2.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 85286.10 ms. Allocated memory was 65.0 MB in the beginning and 362.8 MB in the end (delta: 297.8 MB). Free memory was 45.4 MB in the beginning and 102.6 MB in the end (delta: -57.1 MB). Peak memory consumption was 239.4 MB. Max. memory is 16.1 GB. * Witness Printer took 57.71 ms. Allocated memory is still 362.8 MB. Free memory was 102.6 MB in the beginning and 100.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2080.4ms, 73 PlacesBefore, 23 PlacesAfterwards, 72 TransitionsBefore, 18 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 5 FixpointIterations, 34 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 436 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 427, positive: 425, positive conditional: 0, positive unconditional: 425, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 283, positive: 281, positive conditional: 0, positive unconditional: 281, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 283, positive: 279, positive conditional: 0, positive unconditional: 279, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 19, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 427, positive: 144, positive conditional: 0, positive unconditional: 144, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 283, unknown conditional: 0, unknown unconditional: 283] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - 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: 51]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 85 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 85157.1ms, OverallIterations: 67, TraceHistogramMax: 3, EmptinessCheckTime: 75.9ms, AutomataDifference: 17747.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2146.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2005 SDtfs, 4793 SDslu, 10822 SDs, 0 SdLazy, 10513 SolverSat, 579 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5931.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1853 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 1344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7475 ImplicationChecksByTransitivity, 18858.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=59, InterpolantAutomatonStates: 902, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 352.1ms AutomataMinimizationTime, 67 MinimizatonAttempts, 1898 StatesRemovedByMinimization, 60 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 347.2ms SsaConstructionTime, 1691.6ms SatisfiabilityAnalysisTime, 22899.0ms InterpolantComputationTime, 1976 NumberOfCodeBlocks, 1976 NumberOfCodeBlocksAsserted, 187 NumberOfCheckSat, 1849 ConstructedInterpolants, 0 QuantifiedInterpolants, 20811 SizeOfPredicates, 170 NumberOfNonLiveVariables, 5470 ConjunctsInSsa, 1518 ConjunctsInUnsatCore, 127 InterpolantComputations, 7 PerfectInterpolantSequences, 1/455 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-04 18:54:06,595 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...