./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.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 7991d24d2a0a48f9884a0642c4e90d77f716291d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-03 12:44:47,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-03 12:44:47,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-03 12:44:48,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-03 12:44:48,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-03 12:44:48,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-03 12:44:48,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-03 12:44:48,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-03 12:44:48,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-03 12:44:48,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-03 12:44:48,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-03 12:44:48,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-03 12:44:48,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-03 12:44:48,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-03 12:44:48,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-03 12:44:48,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-03 12:44:48,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-03 12:44:48,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-03 12:44:48,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-03 12:44:48,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-03 12:44:48,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-03 12:44:48,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-03 12:44:48,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-03 12:44:48,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-03 12:44:48,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-03 12:44:48,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-03 12:44:48,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-03 12:44:48,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-03 12:44:48,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-03 12:44:48,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-03 12:44:48,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-03 12:44:48,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-03 12:44:48,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-03 12:44:48,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-03 12:44:48,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-03 12:44:48,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-03 12:44:48,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-03 12:44:48,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-03 12:44:48,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-03 12:44:48,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-03 12:44:48,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-03 12:44:48,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-03 12:44:48,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-03 12:44:48,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-03 12:44:48,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-03 12:44:48,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-03 12:44:48,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-03 12:44:48,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-03 12:44:48,217 INFO L138 SettingsManager]: * Use SBE=true [2021-10-03 12:44:48,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-03 12:44:48,218 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-03 12:44:48,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-03 12:44:48,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-03 12:44:48,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-03 12:44:48,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-03 12:44:48,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-03 12:44:48,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-03 12:44:48,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-03 12:44:48,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-03 12:44:48,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-03 12:44:48,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-03 12:44:48,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-03 12:44:48,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-03 12:44:48,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-03 12:44:48,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:44:48,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-03 12:44:48,223 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-03 12:44:48,223 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-03 12:44:48,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-03 12:44:48,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-03 12:44:48,224 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-03 12:44:48,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-03 12:44:48,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7991d24d2a0a48f9884a0642c4e90d77f716291d [2021-10-03 12:44:48,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-03 12:44:48,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-03 12:44:48,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-03 12:44:48,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-03 12:44:48,818 INFO L275 PluginConnector]: CDTParser initialized [2021-10-03 12:44:48,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-03 12:44:48,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb58a34d7/90568442f355424084e25813204859ae/FLAG476fe4626 [2021-10-03 12:44:49,505 INFO L306 CDTParser]: Found 1 translation units. [2021-10-03 12:44:49,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-03 12:44:49,507 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:44:49,507 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-03 12:44:49,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb58a34d7/90568442f355424084e25813204859ae/FLAG476fe4626 [2021-10-03 12:44:49,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb58a34d7/90568442f355424084e25813204859ae [2021-10-03 12:44:49,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-03 12:44:49,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-03 12:44:49,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-03 12:44:49,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-03 12:44:49,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-03 12:44:49,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:44:49" (1/1) ... [2021-10-03 12:44:49,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5692a015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:49, skipping insertion in model container [2021-10-03 12:44:49,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 12:44:49" (1/1) ... [2021-10-03 12:44:49,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-03 12:44:49,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-03 12:44:50,043 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:44:50,083 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c[1072,1085] [2021-10-03 12:44:50,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:44:50,097 INFO L203 MainTranslator]: Completed pre-run [2021-10-03 12:44:50,110 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-03 12:44:50,119 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c[1072,1085] [2021-10-03 12:44:50,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-03 12:44:50,136 INFO L208 MainTranslator]: Completed translation [2021-10-03 12:44:50,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50 WrapperNode [2021-10-03 12:44:50,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-03 12:44:50,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-03 12:44:50,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-03 12:44:50,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-03 12:44:50,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-03 12:44:50,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-03 12:44:50,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-03 12:44:50,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-03 12:44:50,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-03 12:44:50,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-03 12:44:50,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-03 12:44:50,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-03 12:44:50,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (1/1) ... [2021-10-03 12:44:50,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-03 12:44:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:50,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-03 12:44:50,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-03 12:44:50,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-03 12:44:50,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-03 12:44:50,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-03 12:44:50,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-03 12:44:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-03 12:44:50,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-03 12:44:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-03 12:44:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-03 12:44:50,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-03 12:44:50,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-03 12:44:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-03 12:44:50,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-03 12:44:50,335 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-03 12:44:50,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-03 12:44:50,769 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-03 12:44:50,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:44:50 BoogieIcfgContainer [2021-10-03 12:44:50,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-03 12:44:50,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-03 12:44:50,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-03 12:44:50,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-03 12:44:50,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 12:44:49" (1/3) ... [2021-10-03 12:44:50,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642373dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:44:50, skipping insertion in model container [2021-10-03 12:44:50,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 12:44:50" (2/3) ... [2021-10-03 12:44:50,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642373dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 12:44:50, skipping insertion in model container [2021-10-03 12:44:50,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:44:50" (3/3) ... [2021-10-03 12:44:50,785 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.c [2021-10-03 12:44:50,791 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-03 12:44:50,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-03 12:44:50,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-03 12:44:50,792 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-03 12:44:50,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,826 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,826 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,826 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,827 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,830 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,835 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-03 12:44:50,843 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-03 12:44:50,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-03 12:44:50,904 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-03 12:44:50,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-03 12:44:50,921 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-03 12:44:50,934 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 71 transitions, 158 flow [2021-10-03 12:44:50,937 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 71 transitions, 158 flow [2021-10-03 12:44:50,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 158 flow [2021-10-03 12:44:50,984 INFO L129 PetriNetUnfolder]: 7/69 cut-off events. [2021-10-03 12:44:50,984 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-03 12:44:50,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 7/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 43. Up to 3 conditions per place. [2021-10-03 12:44:50,997 INFO L116 LiptonReduction]: Number of co-enabled transitions 282 [2021-10-03 12:44:53,283 INFO L131 LiptonReduction]: Checked pairs total: 546 [2021-10-03 12:44:53,284 INFO L133 LiptonReduction]: Total number of compositions: 64 [2021-10-03 12:44:53,294 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 19 transitions, 54 flow [2021-10-03 12:44:53,307 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-03 12:44:53,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:53,317 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:53,318 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash -455104020, now seen corresponding path program 1 times [2021-10-03 12:44:53,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:53,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930017538] [2021-10-03 12:44:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:53,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:53,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:53,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930017538] [2021-10-03 12:44:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930017538] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:44:53,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:44:53,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-03 12:44:53,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052392564] [2021-10-03 12:44:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-03 12:44:53,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-03 12:44:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:44:53,643 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:53,689 INFO L93 Difference]: Finished difference Result 40 states and 95 transitions. [2021-10-03 12:44:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-03 12:44:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-03 12:44:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:53,705 INFO L225 Difference]: With dead ends: 40 [2021-10-03 12:44:53,706 INFO L226 Difference]: Without dead ends: 36 [2021-10-03 12:44:53,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-03 12:44:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-03 12:44:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-03 12:44:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 85 transitions. [2021-10-03 12:44:53,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 85 transitions. Word has length 11 [2021-10-03 12:44:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:53,767 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 85 transitions. [2021-10-03 12:44:53,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 85 transitions. [2021-10-03 12:44:53,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-03 12:44:53,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:53,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:53,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-03 12:44:53,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1615301067, now seen corresponding path program 1 times [2021-10-03 12:44:53,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:53,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79933877] [2021-10-03 12:44:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:53,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:53,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:53,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79933877] [2021-10-03 12:44:53,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79933877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:44:53,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:44:53,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-03 12:44:53,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859659693] [2021-10-03 12:44:53,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:44:53,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:44:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:44:53,938 INFO L87 Difference]: Start difference. First operand 36 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-03 12:44:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:53,984 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2021-10-03 12:44:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:44:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 [2021-10-03 12:44:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:53,986 INFO L225 Difference]: With dead ends: 68 [2021-10-03 12:44:53,986 INFO L226 Difference]: Without dead ends: 68 [2021-10-03 12:44:53,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:44:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-03 12:44:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-03 12:44:53,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 160 transitions. [2021-10-03 12:44:53,999 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 160 transitions. Word has length 13 [2021-10-03 12:44:53,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:54,000 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 160 transitions. [2021-10-03 12:44:54,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-03 12:44:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 160 transitions. [2021-10-03 12:44:54,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-03 12:44:54,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:54,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:54,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-03 12:44:54,003 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -274069497, now seen corresponding path program 1 times [2021-10-03 12:44:54,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:54,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232925031] [2021-10-03 12:44:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:54,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:54,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:54,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232925031] [2021-10-03 12:44:54,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232925031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-03 12:44:54,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-03 12:44:54,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-03 12:44:54,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488595516] [2021-10-03 12:44:54,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-03 12:44:54,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-03 12:44:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:44:54,055 INFO L87 Difference]: Start difference. First operand 66 states and 160 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:54,074 INFO L93 Difference]: Finished difference Result 88 states and 206 transitions. [2021-10-03 12:44:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-03 12:44:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-03 12:44:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:54,076 INFO L225 Difference]: With dead ends: 88 [2021-10-03 12:44:54,077 INFO L226 Difference]: Without dead ends: 88 [2021-10-03 12:44:54,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-03 12:44:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-03 12:44:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-03 12:44:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-10-03 12:44:54,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 15 [2021-10-03 12:44:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:54,096 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-10-03 12:44:54,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-10-03 12:44:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:44:54,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:54,099 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:54,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-03 12:44:54,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1909040155, now seen corresponding path program 2 times [2021-10-03 12:44:54,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:54,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266678617] [2021-10-03 12:44:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:54,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:54,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:54,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266678617] [2021-10-03 12:44:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266678617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:54,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149855314] [2021-10-03 12:44:54,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:44:54,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:54,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:54,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:44:54,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-03 12:44:54,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:44:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:44:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-03 12:44:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:44:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:55,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149855314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:55,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:44:55,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-03 12:44:55,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514526870] [2021-10-03 12:44:55,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 12:44:55,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 12:44:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:44:55,073 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:55,472 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2021-10-03 12:44:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:44:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-03 12:44:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:55,474 INFO L225 Difference]: With dead ends: 108 [2021-10-03 12:44:55,474 INFO L226 Difference]: Without dead ends: 82 [2021-10-03 12:44:55,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:44:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-03 12:44:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-10-03 12:44:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2021-10-03 12:44:55,485 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 17 [2021-10-03 12:44:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:55,485 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2021-10-03 12:44:55,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2021-10-03 12:44:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:44:55,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:55,487 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:55,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-03 12:44:55,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:55,703 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash -322709493, now seen corresponding path program 3 times [2021-10-03 12:44:55,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:55,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094304181] [2021-10-03 12:44:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:55,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:55,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:55,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094304181] [2021-10-03 12:44:55,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094304181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:55,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295208985] [2021-10-03 12:44:55,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:44:55,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:55,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:55,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:44:55,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-03 12:44:56,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-03 12:44:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:44:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-03 12:44:56,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:44:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:56,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295208985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:56,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:44:56,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-03 12:44:56,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897337209] [2021-10-03 12:44:56,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 12:44:56,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 12:44:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:44:56,553 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:56,969 INFO L93 Difference]: Finished difference Result 146 states and 338 transitions. [2021-10-03 12:44:56,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:44:56,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-03 12:44:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:56,972 INFO L225 Difference]: With dead ends: 146 [2021-10-03 12:44:56,972 INFO L226 Difference]: Without dead ends: 122 [2021-10-03 12:44:56,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:44:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-03 12:44:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-10-03 12:44:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.5054945054945055) internal successors, (228), 91 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 228 transitions. [2021-10-03 12:44:56,983 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 228 transitions. Word has length 17 [2021-10-03 12:44:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:56,983 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 228 transitions. [2021-10-03 12:44:56,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 228 transitions. [2021-10-03 12:44:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:44:56,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:56,988 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:57,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-03 12:44:57,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:57,189 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:57,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:57,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1013299205, now seen corresponding path program 4 times [2021-10-03 12:44:57,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:57,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450869256] [2021-10-03 12:44:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:57,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:57,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:57,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450869256] [2021-10-03 12:44:57,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450869256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:57,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522224965] [2021-10-03 12:44:57,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:44:57,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:57,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:57,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:44:57,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-03 12:44:57,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:44:57,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:44:57,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:44:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:44:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:57,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522224965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:57,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:44:57,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-03 12:44:57,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292244788] [2021-10-03 12:44:57,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:44:57,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:44:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:44:57,772 INFO L87 Difference]: Start difference. First operand 92 states and 228 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:58,213 INFO L93 Difference]: Finished difference Result 144 states and 350 transitions. [2021-10-03 12:44:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-03 12:44:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 17 [2021-10-03 12:44:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:58,215 INFO L225 Difference]: With dead ends: 144 [2021-10-03 12:44:58,215 INFO L226 Difference]: Without dead ends: 122 [2021-10-03 12:44:58,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:44:58,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-03 12:44:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-10-03 12:44:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.493827160493827) internal successors, (202), 81 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2021-10-03 12:44:58,225 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 17 [2021-10-03 12:44:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2021-10-03 12:44:58,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2021-10-03 12:44:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:44:58,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:58,227 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:58,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-03 12:44:58,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:58,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash -419863205, now seen corresponding path program 5 times [2021-10-03 12:44:58,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:58,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137556049] [2021-10-03 12:44:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:58,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:58,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:58,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137556049] [2021-10-03 12:44:58,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137556049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:58,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822040106] [2021-10-03 12:44:58,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:44:58,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:58,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:58,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:44:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-03 12:44:58,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:44:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:44:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-03 12:44:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:44:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:59,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822040106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:59,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:44:59,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-03 12:44:59,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055689615] [2021-10-03 12:44:59,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:44:59,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:44:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:44:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:44:59,070 INFO L87 Difference]: Start difference. First operand 82 states and 202 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) [2021-10-03 12:44:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:44:59,433 INFO L93 Difference]: Finished difference Result 140 states and 321 transitions. [2021-10-03 12:44:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:44:59,433 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 17 [2021-10-03 12:44:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:44:59,435 INFO L225 Difference]: With dead ends: 140 [2021-10-03 12:44:59,435 INFO L226 Difference]: Without dead ends: 114 [2021-10-03 12:44:59,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-10-03 12:44:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-03 12:44:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2021-10-03 12:44:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.5242718446601944) internal successors, (260), 103 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:44:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 260 transitions. [2021-10-03 12:44:59,446 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 260 transitions. Word has length 17 [2021-10-03 12:44:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:44:59,446 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 260 transitions. [2021-10-03 12:44:59,446 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) [2021-10-03 12:44:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 260 transitions. [2021-10-03 12:44:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:44:59,450 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:44:59,450 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:44:59,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-03 12:44:59,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:59,665 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:44:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:44:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1110452917, now seen corresponding path program 6 times [2021-10-03 12:44:59,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:44:59,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428115959] [2021-10-03 12:44:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:44:59,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:44:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:44:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:44:59,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:44:59,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428115959] [2021-10-03 12:44:59,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428115959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:44:59,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758887978] [2021-10-03 12:44:59,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:44:59,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:44:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:44:59,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:44:59,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-03 12:44:59,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:44:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:44:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-03 12:44:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:00,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758887978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:00,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:00,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-03 12:45:00,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777537774] [2021-10-03 12:45:00,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:45:00,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:00,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:45:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:45:00,375 INFO L87 Difference]: Start difference. First operand 104 states and 260 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:00,846 INFO L93 Difference]: Finished difference Result 156 states and 380 transitions. [2021-10-03 12:45:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-03 12:45:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 [2021-10-03 12:45:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:00,853 INFO L225 Difference]: With dead ends: 156 [2021-10-03 12:45:00,853 INFO L226 Difference]: Without dead ends: 134 [2021-10-03 12:45:00,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:45:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-03 12:45:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 90. [2021-10-03 12:45:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.5168539325842696) internal successors, (224), 89 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 224 transitions. [2021-10-03 12:45:00,876 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 224 transitions. Word has length 17 [2021-10-03 12:45:00,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:00,877 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 224 transitions. [2021-10-03 12:45:00,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:00,877 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 224 transitions. [2021-10-03 12:45:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:45:00,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:00,878 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:00,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:01,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:01,093 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:01,094 INFO L82 PathProgramCache]: Analyzing trace with hash 996174639, now seen corresponding path program 7 times [2021-10-03 12:45:01,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:01,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856101872] [2021-10-03 12:45:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:01,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:01,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:01,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856101872] [2021-10-03 12:45:01,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856101872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:01,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153792498] [2021-10-03 12:45:01,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:45:01,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:01,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:01,230 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:01,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-03 12:45:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-03 12:45:01,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:01,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153792498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:01,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:01,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-03 12:45:01,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345045050] [2021-10-03 12:45:01,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-03 12:45:01,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:01,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-03 12:45:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-03 12:45:01,668 INFO L87 Difference]: Start difference. First operand 90 states and 224 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2021-10-03 12:45:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:01,930 INFO L93 Difference]: Finished difference Result 135 states and 330 transitions. [2021-10-03 12:45:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-03 12:45:01,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-10-03 12:45:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:01,932 INFO L225 Difference]: With dead ends: 135 [2021-10-03 12:45:01,932 INFO L226 Difference]: Without dead ends: 130 [2021-10-03 12:45:01,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-03 12:45:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 106. [2021-10-03 12:45:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.5714285714285716) internal successors, (270), 105 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2021-10-03 12:45:01,939 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 17 [2021-10-03 12:45:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:01,940 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2021-10-03 12:45:01,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 14 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) [2021-10-03 12:45:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2021-10-03 12:45:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:45:01,941 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:01,941 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:01,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:02,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:02,142 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash 305584927, now seen corresponding path program 8 times [2021-10-03 12:45:02,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:02,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469497353] [2021-10-03 12:45:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:02,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:02,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:02,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469497353] [2021-10-03 12:45:02,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469497353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:02,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850013195] [2021-10-03 12:45:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:45:02,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:02,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:02,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-03 12:45:02,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:45:02,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:02,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-03 12:45:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:02,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850013195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:02,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:02,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-03 12:45:02,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910891140] [2021-10-03 12:45:02,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:45:02,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:45:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:45:02,726 INFO L87 Difference]: Start difference. First operand 106 states and 270 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) [2021-10-03 12:45:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:03,108 INFO L93 Difference]: Finished difference Result 196 states and 482 transitions. [2021-10-03 12:45:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:45:03,109 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 17 [2021-10-03 12:45:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:03,111 INFO L225 Difference]: With dead ends: 196 [2021-10-03 12:45:03,111 INFO L226 Difference]: Without dead ends: 170 [2021-10-03 12:45:03,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 283.7ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:45:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-03 12:45:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 108. [2021-10-03 12:45:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.607476635514019) internal successors, (279), 107 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 279 transitions. [2021-10-03 12:45:03,124 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 279 transitions. Word has length 17 [2021-10-03 12:45:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:03,125 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 279 transitions. [2021-10-03 12:45:03,125 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) [2021-10-03 12:45:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 279 transitions. [2021-10-03 12:45:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-03 12:45:03,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:03,128 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:03,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:03,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-03 12:45:03,343 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:03,344 INFO L82 PathProgramCache]: Analyzing trace with hash 537885807, now seen corresponding path program 9 times [2021-10-03 12:45:03,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:03,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146423689] [2021-10-03 12:45:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:03,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:03,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:03,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146423689] [2021-10-03 12:45:03,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146423689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:03,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299597906] [2021-10-03 12:45:03,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:45:03,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:03,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:03,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:03,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-03 12:45:03,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:45:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:03,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-03 12:45:03,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:03,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299597906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:03,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:03,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-03 12:45:03,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290012857] [2021-10-03 12:45:03,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:45:03,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:03,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:45:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:45:03,998 INFO L87 Difference]: Start difference. First operand 108 states and 279 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) [2021-10-03 12:45:04,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:04,337 INFO L93 Difference]: Finished difference Result 178 states and 441 transitions. [2021-10-03 12:45:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-03 12:45:04,338 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 17 [2021-10-03 12:45:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:04,339 INFO L225 Difference]: With dead ends: 178 [2021-10-03 12:45:04,340 INFO L226 Difference]: Without dead ends: 152 [2021-10-03 12:45:04,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-03 12:45:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 110. [2021-10-03 12:45:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.623853211009174) internal successors, (286), 109 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 286 transitions. [2021-10-03 12:45:04,346 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 286 transitions. Word has length 17 [2021-10-03 12:45:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:04,346 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 286 transitions. [2021-10-03 12:45:04,346 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) [2021-10-03 12:45:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 286 transitions. [2021-10-03 12:45:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 12:45:04,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:04,347 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:04,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:04,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-03 12:45:04,560 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1624552734, now seen corresponding path program 10 times [2021-10-03 12:45:04,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:04,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947881501] [2021-10-03 12:45:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:04,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:04,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:04,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947881501] [2021-10-03 12:45:04,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947881501] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:04,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318902819] [2021-10-03 12:45:04,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:45:04,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:04,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:04,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-03 12:45:04,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:45:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:05,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318902819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:05,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:05,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 13 [2021-10-03 12:45:05,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535581610] [2021-10-03 12:45:05,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-03 12:45:05,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-03 12:45:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-10-03 12:45:05,159 INFO L87 Difference]: Start difference. First operand 110 states and 286 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:05,400 INFO L93 Difference]: Finished difference Result 198 states and 496 transitions. [2021-10-03 12:45:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-03 12:45:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-03 12:45:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:05,403 INFO L225 Difference]: With dead ends: 198 [2021-10-03 12:45:05,403 INFO L226 Difference]: Without dead ends: 198 [2021-10-03 12:45:05,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-10-03 12:45:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-03 12:45:05,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 122. [2021-10-03 12:45:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.6115702479338845) internal successors, (316), 121 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 316 transitions. [2021-10-03 12:45:05,410 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 316 transitions. Word has length 19 [2021-10-03 12:45:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:05,410 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 316 transitions. [2021-10-03 12:45:05,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 316 transitions. [2021-10-03 12:45:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 12:45:05,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:05,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:05,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:05,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:05,626 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:05,627 INFO L82 PathProgramCache]: Analyzing trace with hash 158794226, now seen corresponding path program 11 times [2021-10-03 12:45:05,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:05,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714560939] [2021-10-03 12:45:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:05,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:05,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:05,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714560939] [2021-10-03 12:45:05,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714560939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:05,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786979462] [2021-10-03 12:45:05,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:45:05,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:05,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:05,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:05,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-03 12:45:05,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:45:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-03 12:45:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:05,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786979462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:05,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:05,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-03 12:45:05,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430717363] [2021-10-03 12:45:05,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-03 12:45:05,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:05,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-03 12:45:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:45:05,922 INFO L87 Difference]: Start difference. First operand 122 states and 316 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:05,939 INFO L93 Difference]: Finished difference Result 192 states and 472 transitions. [2021-10-03 12:45:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-03 12:45:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-03 12:45:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:05,944 INFO L225 Difference]: With dead ends: 192 [2021-10-03 12:45:05,944 INFO L226 Difference]: Without dead ends: 192 [2021-10-03 12:45:05,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-03 12:45:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-03 12:45:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 134. [2021-10-03 12:45:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.6466165413533833) internal successors, (352), 133 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 352 transitions. [2021-10-03 12:45:05,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 352 transitions. Word has length 19 [2021-10-03 12:45:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:05,952 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 352 transitions. [2021-10-03 12:45:05,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 352 transitions. [2021-10-03 12:45:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 12:45:05,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:05,955 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:05,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:06,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-03 12:45:06,171 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1930077271, now seen corresponding path program 12 times [2021-10-03 12:45:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:06,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518957421] [2021-10-03 12:45:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:06,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:45:06,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:06,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518957421] [2021-10-03 12:45:06,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518957421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:06,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200772291] [2021-10-03 12:45:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:45:06,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:06,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:06,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:06,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-03 12:45:06,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-03 12:45:06,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:06,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:06,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:06,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200772291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:06,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:06,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-03 12:45:06,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139179003] [2021-10-03 12:45:06,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:45:06,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:45:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:45:06,890 INFO L87 Difference]: Start difference. First operand 134 states and 352 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:07,615 INFO L93 Difference]: Finished difference Result 236 states and 584 transitions. [2021-10-03 12:45:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:45:07,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-03 12:45:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:07,621 INFO L225 Difference]: With dead ends: 236 [2021-10-03 12:45:07,621 INFO L226 Difference]: Without dead ends: 194 [2021-10-03 12:45:07,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 588.8ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:45:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-03 12:45:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 168. [2021-10-03 12:45:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-10-03 12:45:07,631 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 19 [2021-10-03 12:45:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:07,631 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-10-03 12:45:07,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-10-03 12:45:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 12:45:07,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:07,633 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:07,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-03 12:45:07,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:07,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash -658569481, now seen corresponding path program 13 times [2021-10-03 12:45:07,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:07,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733769490] [2021-10-03 12:45:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:07,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:08,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:08,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733769490] [2021-10-03 12:45:08,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733769490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:08,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844250168] [2021-10-03 12:45:08,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:45:08,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:08,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:08,004 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:08,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-03 12:45:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-03 12:45:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:08,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844250168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:08,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:08,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-10-03 12:45:08,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824497621] [2021-10-03 12:45:08,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-03 12:45:08,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-03 12:45:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-03 12:45:08,530 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:09,109 INFO L93 Difference]: Finished difference Result 302 states and 782 transitions. [2021-10-03 12:45:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:45:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 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 19 [2021-10-03 12:45:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:09,113 INFO L225 Difference]: With dead ends: 302 [2021-10-03 12:45:09,113 INFO L226 Difference]: Without dead ends: 280 [2021-10-03 12:45:09,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:45:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-10-03 12:45:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 168. [2021-10-03 12:45:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-10-03 12:45:09,122 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 19 [2021-10-03 12:45:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:09,123 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-10-03 12:45:09,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-10-03 12:45:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-03 12:45:09,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:09,124 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:09,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:09,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-03 12:45:09,338 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:09,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:09,338 INFO L82 PathProgramCache]: Analyzing trace with hash -426268601, now seen corresponding path program 14 times [2021-10-03 12:45:09,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:09,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542385388] [2021-10-03 12:45:09,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:09,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:09,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:09,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542385388] [2021-10-03 12:45:09,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542385388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:09,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985989401] [2021-10-03 12:45:09,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:45:09,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:09,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:09,503 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:09,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-03 12:45:09,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:45:09,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-03 12:45:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:10,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985989401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:10,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:10,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-03 12:45:10,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279957269] [2021-10-03 12:45:10,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:45:10,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:45:10,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:45:10,086 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:10,553 INFO L93 Difference]: Finished difference Result 278 states and 718 transitions. [2021-10-03 12:45:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-03 12:45:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-03 12:45:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:10,557 INFO L225 Difference]: With dead ends: 278 [2021-10-03 12:45:10,557 INFO L226 Difference]: Without dead ends: 256 [2021-10-03 12:45:10,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-10-03 12:45:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-10-03 12:45:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 168. [2021-10-03 12:45:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-10-03 12:45:10,567 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 19 [2021-10-03 12:45:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:10,567 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-10-03 12:45:10,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-10-03 12:45:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:10,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:10,569 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:10,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-03 12:45:10,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-03 12:45:10,784 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash 211037830, now seen corresponding path program 15 times [2021-10-03 12:45:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:10,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866188649] [2021-10-03 12:45:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:10,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:45:10,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:10,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866188649] [2021-10-03 12:45:10,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866188649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:10,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337117837] [2021-10-03 12:45:10,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:45:10,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:10,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:10,977 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:10,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-03 12:45:11,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 12:45:11,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:11,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337117837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:11,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:11,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-03 12:45:11,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892760630] [2021-10-03 12:45:11,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:11,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:11,645 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:12,614 INFO L93 Difference]: Finished difference Result 276 states and 678 transitions. [2021-10-03 12:45:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:45:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 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 21 [2021-10-03 12:45:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:12,617 INFO L225 Difference]: With dead ends: 276 [2021-10-03 12:45:12,617 INFO L226 Difference]: Without dead ends: 220 [2021-10-03 12:45:12,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-10-03 12:45:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-03 12:45:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 194. [2021-10-03 12:45:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.6373056994818653) internal successors, (509), 193 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 509 transitions. [2021-10-03 12:45:12,625 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 509 transitions. Word has length 21 [2021-10-03 12:45:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:12,625 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 509 transitions. [2021-10-03 12:45:12,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 509 transitions. [2021-10-03 12:45:12,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:12,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:12,626 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:12,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:12,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-03 12:45:12,828 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:12,828 INFO L82 PathProgramCache]: Analyzing trace with hash -187129914, now seen corresponding path program 16 times [2021-10-03 12:45:12,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:12,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595525897] [2021-10-03 12:45:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:12,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:45:13,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:13,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595525897] [2021-10-03 12:45:13,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595525897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:13,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121748105] [2021-10-03 12:45:13,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:45:13,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:13,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-03 12:45:13,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:45:13,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:13,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121748105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:13,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:13,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-03 12:45:13,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301483594] [2021-10-03 12:45:13,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:13,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:13,749 INFO L87 Difference]: Start difference. First operand 194 states and 509 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:14,413 INFO L93 Difference]: Finished difference Result 282 states and 697 transitions. [2021-10-03 12:45:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:45:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21 [2021-10-03 12:45:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:14,416 INFO L225 Difference]: With dead ends: 282 [2021-10-03 12:45:14,416 INFO L226 Difference]: Without dead ends: 242 [2021-10-03 12:45:14,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 12:45:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-03 12:45:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208. [2021-10-03 12:45:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.608695652173913) internal successors, (540), 207 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:14,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 540 transitions. [2021-10-03 12:45:14,425 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 540 transitions. Word has length 21 [2021-10-03 12:45:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:14,426 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 540 transitions. [2021-10-03 12:45:14,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 540 transitions. [2021-10-03 12:45:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:14,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:14,427 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:14,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:14,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-03 12:45:14,641 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1185498022, now seen corresponding path program 17 times [2021-10-03 12:45:14,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:14,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013405818] [2021-10-03 12:45:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:14,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:45:14,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:14,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013405818] [2021-10-03 12:45:14,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013405818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:14,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324954005] [2021-10-03 12:45:14,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:45:14,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:14,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:14,821 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:14,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-03 12:45:15,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-03 12:45:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:15,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:15,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:15,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324954005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:15,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:15,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-03 12:45:15,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875509819] [2021-10-03 12:45:15,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-03 12:45:15,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-03 12:45:15,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-03 12:45:15,538 INFO L87 Difference]: Start difference. First operand 208 states and 540 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:16,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:16,320 INFO L93 Difference]: Finished difference Result 288 states and 735 transitions. [2021-10-03 12:45:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:45:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:45:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:16,323 INFO L225 Difference]: With dead ends: 288 [2021-10-03 12:45:16,323 INFO L226 Difference]: Without dead ends: 266 [2021-10-03 12:45:16,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:45:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-03 12:45:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 192. [2021-10-03 12:45:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.6178010471204187) internal successors, (500), 191 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 500 transitions. [2021-10-03 12:45:16,332 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 500 transitions. Word has length 21 [2021-10-03 12:45:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:16,333 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 500 transitions. [2021-10-03 12:45:16,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 500 transitions. [2021-10-03 12:45:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:16,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:16,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:16,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:16,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:16,535 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1539323190, now seen corresponding path program 18 times [2021-10-03 12:45:16,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:16,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021274214] [2021-10-03 12:45:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:16,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:45:16,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021274214] [2021-10-03 12:45:16,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021274214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522471634] [2021-10-03 12:45:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:45:16,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:16,718 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:16,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-03 12:45:17,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-03 12:45:17,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:17,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:17,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:17,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522471634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:17,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:17,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-03 12:45:17,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271490154] [2021-10-03 12:45:17,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:17,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:17,459 INFO L87 Difference]: Start difference. First operand 192 states and 500 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:18,535 INFO L93 Difference]: Finished difference Result 386 states and 986 transitions. [2021-10-03 12:45:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:45:18,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 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 21 [2021-10-03 12:45:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:18,539 INFO L225 Difference]: With dead ends: 386 [2021-10-03 12:45:18,539 INFO L226 Difference]: Without dead ends: 328 [2021-10-03 12:45:18,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 873.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-10-03 12:45:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-03 12:45:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 258. [2021-10-03 12:45:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.6264591439688716) internal successors, (675), 257 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 675 transitions. [2021-10-03 12:45:18,557 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 675 transitions. Word has length 21 [2021-10-03 12:45:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:18,557 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 675 transitions. [2021-10-03 12:45:18,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 675 transitions. [2021-10-03 12:45:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:18,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:18,559 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:18,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:18,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:18,773 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1247869002, now seen corresponding path program 19 times [2021-10-03 12:45:18,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:18,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249879133] [2021-10-03 12:45:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:18,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:45:18,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:18,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249879133] [2021-10-03 12:45:18,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249879133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:18,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072167196] [2021-10-03 12:45:18,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:45:18,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:18,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:18,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:18,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-03 12:45:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:19,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:19,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072167196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:19,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:19,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-03 12:45:19,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470745862] [2021-10-03 12:45:19,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:19,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:19,762 INFO L87 Difference]: Start difference. First operand 258 states and 675 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:20,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:20,376 INFO L93 Difference]: Finished difference Result 442 states and 1143 transitions. [2021-10-03 12:45:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:45:20,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:45:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:20,380 INFO L225 Difference]: With dead ends: 442 [2021-10-03 12:45:20,380 INFO L226 Difference]: Without dead ends: 412 [2021-10-03 12:45:20,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 532.0ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:45:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-03 12:45:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 284. [2021-10-03 12:45:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.664310954063604) internal successors, (754), 283 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 754 transitions. [2021-10-03 12:45:20,395 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 754 transitions. Word has length 21 [2021-10-03 12:45:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:20,395 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 754 transitions. [2021-10-03 12:45:20,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 754 transitions. [2021-10-03 12:45:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:20,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:20,398 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:20,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:20,612 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1049323562, now seen corresponding path program 20 times [2021-10-03 12:45:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:20,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409251057] [2021-10-03 12:45:20,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:20,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:20,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:20,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409251057] [2021-10-03 12:45:20,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409251057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:20,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591080029] [2021-10-03 12:45:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:45:20,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:20,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:20,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-03 12:45:21,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:45:21,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-03 12:45:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:21,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591080029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:21,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:21,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-03 12:45:21,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012188415] [2021-10-03 12:45:21,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:21,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:21,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:21,586 INFO L87 Difference]: Start difference. First operand 284 states and 754 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:22,363 INFO L93 Difference]: Finished difference Result 472 states and 1237 transitions. [2021-10-03 12:45:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:45:22,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 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 21 [2021-10-03 12:45:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:22,367 INFO L225 Difference]: With dead ends: 472 [2021-10-03 12:45:22,367 INFO L226 Difference]: Without dead ends: 450 [2021-10-03 12:45:22,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:45:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-03 12:45:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 284. [2021-10-03 12:45:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.664310954063604) internal successors, (754), 283 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 754 transitions. [2021-10-03 12:45:22,380 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 754 transitions. Word has length 21 [2021-10-03 12:45:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:22,380 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 754 transitions. [2021-10-03 12:45:22,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 754 transitions. [2021-10-03 12:45:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:22,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:22,382 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:22,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:22,595 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,SelfDestructingSolverStorable21 [2021-10-03 12:45:22,596 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:22,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash -87123322, now seen corresponding path program 21 times [2021-10-03 12:45:22,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:22,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507833007] [2021-10-03 12:45:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:22,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:45:22,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:22,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507833007] [2021-10-03 12:45:22,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507833007] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:22,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576701195] [2021-10-03 12:45:22,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:45:22,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:22,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:22,771 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:22,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-03 12:45:23,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-03 12:45:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:23,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576701195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:23,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:23,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-03 12:45:23,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869748379] [2021-10-03 12:45:23,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:23,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:23,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:23,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:23,589 INFO L87 Difference]: Start difference. First operand 284 states and 754 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:24,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:24,695 INFO L93 Difference]: Finished difference Result 502 states and 1307 transitions. [2021-10-03 12:45:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-03 12:45:24,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:45:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:24,700 INFO L225 Difference]: With dead ends: 502 [2021-10-03 12:45:24,700 INFO L226 Difference]: Without dead ends: 444 [2021-10-03 12:45:24,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:45:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-10-03 12:45:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 346. [2021-10-03 12:45:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.6753623188405795) internal successors, (923), 345 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 923 transitions. [2021-10-03 12:45:24,723 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 923 transitions. Word has length 21 [2021-10-03 12:45:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:24,724 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 923 transitions. [2021-10-03 12:45:24,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 923 transitions. [2021-10-03 12:45:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:24,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:24,726 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:24,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:24,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:24,940 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1420651782, now seen corresponding path program 22 times [2021-10-03 12:45:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:24,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324492422] [2021-10-03 12:45:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:24,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:45:25,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:25,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324492422] [2021-10-03 12:45:25,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324492422] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:25,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393549830] [2021-10-03 12:45:25,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:45:25,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:25,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:25,147 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:25,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-03 12:45:25,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:45:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:26,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393549830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:26,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:26,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-03 12:45:26,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702826048] [2021-10-03 12:45:26,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:26,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:26,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:26,005 INFO L87 Difference]: Start difference. First operand 346 states and 923 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:26,738 INFO L93 Difference]: Finished difference Result 550 states and 1445 transitions. [2021-10-03 12:45:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:45:26,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 21 [2021-10-03 12:45:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:26,743 INFO L225 Difference]: With dead ends: 550 [2021-10-03 12:45:26,743 INFO L226 Difference]: Without dead ends: 520 [2021-10-03 12:45:26,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:45:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-10-03 12:45:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 296. [2021-10-03 12:45:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.664406779661017) internal successors, (786), 295 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 786 transitions. [2021-10-03 12:45:26,756 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 786 transitions. Word has length 21 [2021-10-03 12:45:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:26,757 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 786 transitions. [2021-10-03 12:45:26,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 786 transitions. [2021-10-03 12:45:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:26,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:26,759 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:26,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:26,972 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,SelfDestructingSolverStorable23 [2021-10-03 12:45:26,972 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1619197222, now seen corresponding path program 23 times [2021-10-03 12:45:26,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:26,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617595228] [2021-10-03 12:45:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:26,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:27,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:27,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617595228] [2021-10-03 12:45:27,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617595228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:27,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983532985] [2021-10-03 12:45:27,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:45:27,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:27,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:27,147 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:27,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-03 12:45:27,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-03 12:45:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:27,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-03 12:45:27,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:27,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983532985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:27,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:27,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-03 12:45:27,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533302914] [2021-10-03 12:45:27,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:27,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:27,998 INFO L87 Difference]: Start difference. First operand 296 states and 786 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:28,880 INFO L93 Difference]: Finished difference Result 512 states and 1341 transitions. [2021-10-03 12:45:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:45:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:45:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:28,895 INFO L225 Difference]: With dead ends: 512 [2021-10-03 12:45:28,895 INFO L226 Difference]: Without dead ends: 490 [2021-10-03 12:45:28,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:45:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-10-03 12:45:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 296. [2021-10-03 12:45:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.671186440677966) internal successors, (788), 295 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 788 transitions. [2021-10-03 12:45:28,920 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 788 transitions. Word has length 21 [2021-10-03 12:45:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:28,920 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 788 transitions. [2021-10-03 12:45:28,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 788 transitions. [2021-10-03 12:45:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:28,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:28,923 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:28,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:29,136 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,SelfDestructingSolverStorable24 [2021-10-03 12:45:29,137 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1551206794, now seen corresponding path program 24 times [2021-10-03 12:45:29,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:29,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740075941] [2021-10-03 12:45:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:29,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:29,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:29,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740075941] [2021-10-03 12:45:29,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740075941] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:29,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712983201] [2021-10-03 12:45:29,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:45:29,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:29,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:29,363 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:29,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-03 12:45:29,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-03 12:45:29,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:29,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:29,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:30,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712983201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:30,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:30,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-03 12:45:30,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385390786] [2021-10-03 12:45:30,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-03 12:45:30,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-03 12:45:30,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-10-03 12:45:30,254 INFO L87 Difference]: Start difference. First operand 296 states and 788 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:31,162 INFO L93 Difference]: Finished difference Result 536 states and 1411 transitions. [2021-10-03 12:45:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:45:31,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:45:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:31,166 INFO L225 Difference]: With dead ends: 536 [2021-10-03 12:45:31,166 INFO L226 Difference]: Without dead ends: 514 [2021-10-03 12:45:31,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 814.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-10-03 12:45:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-10-03 12:45:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-10-03 12:45:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.6666666666666665) internal successors, (776), 291 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 776 transitions. [2021-10-03 12:45:31,178 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 776 transitions. Word has length 21 [2021-10-03 12:45:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:31,178 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 776 transitions. [2021-10-03 12:45:31,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:31,179 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 776 transitions. [2021-10-03 12:45:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:31,180 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:31,180 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:31,217 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 [2021-10-03 12:45:31,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-03 12:45:31,397 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash 366384730, now seen corresponding path program 25 times [2021-10-03 12:45:31,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:31,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635944098] [2021-10-03 12:45:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:31,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:31,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:31,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635944098] [2021-10-03 12:45:31,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635944098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:31,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661593093] [2021-10-03 12:45:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:45:31,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:31,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:31,574 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:31,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-03 12:45:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:32,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:32,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661593093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:32,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-03 12:45:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642382071] [2021-10-03 12:45:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:45:32,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:45:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:45:32,537 INFO L87 Difference]: Start difference. First operand 292 states and 776 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) [2021-10-03 12:45:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:32,993 INFO L93 Difference]: Finished difference Result 384 states and 971 transitions. [2021-10-03 12:45:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-03 12:45:32,994 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 21 [2021-10-03 12:45:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:32,996 INFO L225 Difference]: With dead ends: 384 [2021-10-03 12:45:32,997 INFO L226 Difference]: Without dead ends: 374 [2021-10-03 12:45:32,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-10-03 12:45:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-03 12:45:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 300. [2021-10-03 12:45:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6755852842809364) internal successors, (800), 299 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 800 transitions. [2021-10-03 12:45:33,010 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 800 transitions. Word has length 21 [2021-10-03 12:45:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:33,010 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 800 transitions. [2021-10-03 12:45:33,011 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) [2021-10-03 12:45:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 800 transitions. [2021-10-03 12:45:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:33,012 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:33,012 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:33,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:33,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-03 12:45:33,227 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:33,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1865364918, now seen corresponding path program 26 times [2021-10-03 12:45:33,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:33,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067994321] [2021-10-03 12:45:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:33,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:33,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067994321] [2021-10-03 12:45:33,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067994321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936001242] [2021-10-03 12:45:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:45:33,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:33,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:33,406 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:33,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-03 12:45:33,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:45:33,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936001242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:34,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:34,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-03 12:45:34,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339829744] [2021-10-03 12:45:34,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:34,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:34,339 INFO L87 Difference]: Start difference. First operand 300 states and 800 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:35,260 INFO L93 Difference]: Finished difference Result 483 states and 1224 transitions. [2021-10-03 12:45:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-03 12:45:35,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21 [2021-10-03 12:45:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:35,264 INFO L225 Difference]: With dead ends: 483 [2021-10-03 12:45:35,264 INFO L226 Difference]: Without dead ends: 452 [2021-10-03 12:45:35,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-10-03 12:45:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-10-03 12:45:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 316. [2021-10-03 12:45:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.704761904761905) internal successors, (852), 315 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 852 transitions. [2021-10-03 12:45:35,276 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 852 transitions. Word has length 21 [2021-10-03 12:45:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:35,276 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 852 transitions. [2021-10-03 12:45:35,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 852 transitions. [2021-10-03 12:45:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:35,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:35,278 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:35,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-03 12:45:35,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-03 12:45:35,493 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1962518630, now seen corresponding path program 27 times [2021-10-03 12:45:35,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:35,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033376461] [2021-10-03 12:45:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:35,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:35,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:35,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033376461] [2021-10-03 12:45:35,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033376461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:35,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895430777] [2021-10-03 12:45:35,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:45:35,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:35,674 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:35,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-03 12:45:36,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-03 12:45:36,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:36,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:36,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:36,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895430777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:36,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:36,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-03 12:45:36,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354789314] [2021-10-03 12:45:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:36,617 INFO L87 Difference]: Start difference. First operand 316 states and 852 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:37,375 INFO L93 Difference]: Finished difference Result 509 states and 1321 transitions. [2021-10-03 12:45:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:45:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21 [2021-10-03 12:45:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:37,378 INFO L225 Difference]: With dead ends: 509 [2021-10-03 12:45:37,378 INFO L226 Difference]: Without dead ends: 478 [2021-10-03 12:45:37,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:45:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-10-03 12:45:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 336. [2021-10-03 12:45:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-10-03 12:45:37,391 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 21 [2021-10-03 12:45:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:37,391 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-10-03 12:45:37,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-10-03 12:45:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:37,393 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:37,393 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:37,428 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 [2021-10-03 12:45:37,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-03 12:45:37,608 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1874159834, now seen corresponding path program 28 times [2021-10-03 12:45:37,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:37,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935104536] [2021-10-03 12:45:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:37,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:37,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:37,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935104536] [2021-10-03 12:45:37,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935104536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:37,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126373998] [2021-10-03 12:45:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:45:37,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:37,785 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:37,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-03 12:45:38,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:45:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:38,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126373998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:38,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:38,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-03 12:45:38,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717153476] [2021-10-03 12:45:38,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:45:38,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:45:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:45:38,803 INFO L87 Difference]: Start difference. First operand 336 states and 910 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) [2021-10-03 12:45:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:39,463 INFO L93 Difference]: Finished difference Result 573 states and 1516 transitions. [2021-10-03 12:45:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:45:39,465 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 21 [2021-10-03 12:45:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:39,468 INFO L225 Difference]: With dead ends: 573 [2021-10-03 12:45:39,468 INFO L226 Difference]: Without dead ends: 538 [2021-10-03 12:45:39,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-10-03 12:45:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-03 12:45:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 338. [2021-10-03 12:45:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.72106824925816) internal successors, (917), 337 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 917 transitions. [2021-10-03 12:45:39,479 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 917 transitions. Word has length 21 [2021-10-03 12:45:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:39,480 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 917 transitions. [2021-10-03 12:45:39,480 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) [2021-10-03 12:45:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 917 transitions. [2021-10-03 12:45:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:39,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:39,481 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:39,518 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 [2021-10-03 12:45:39,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:39,696 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:39,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1531672310, now seen corresponding path program 29 times [2021-10-03 12:45:39,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:39,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628203425] [2021-10-03 12:45:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:39,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:39,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:39,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628203425] [2021-10-03 12:45:39,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628203425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:39,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500534453] [2021-10-03 12:45:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:45:39,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:39,897 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:39,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-03 12:45:40,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:45:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:40,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500534453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:40,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:40,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-03 12:45:40,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074327084] [2021-10-03 12:45:40,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:45:40,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:45:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:45:40,932 INFO L87 Difference]: Start difference. First operand 338 states and 917 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) [2021-10-03 12:45:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:41,752 INFO L93 Difference]: Finished difference Result 572 states and 1485 transitions. [2021-10-03 12:45:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:45:41,752 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 21 [2021-10-03 12:45:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:41,756 INFO L225 Difference]: With dead ends: 572 [2021-10-03 12:45:41,756 INFO L226 Difference]: Without dead ends: 562 [2021-10-03 12:45:41,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-10-03 12:45:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-10-03 12:45:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 378. [2021-10-03 12:45:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.750663129973475) internal successors, (1037), 377 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1037 transitions. [2021-10-03 12:45:41,768 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1037 transitions. Word has length 21 [2021-10-03 12:45:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:41,769 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1037 transitions. [2021-10-03 12:45:41,769 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) [2021-10-03 12:45:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1037 transitions. [2021-10-03 12:45:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:41,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:41,771 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:41,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-03 12:45:41,977 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,SelfDestructingSolverStorable30 [2021-10-03 12:45:41,978 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2072705274, now seen corresponding path program 30 times [2021-10-03 12:45:41,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:41,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012581467] [2021-10-03 12:45:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:41,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:42,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:42,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012581467] [2021-10-03 12:45:42,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012581467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:42,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206192341] [2021-10-03 12:45:42,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:45:42,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:42,159 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:42,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-03 12:45:42,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-03 12:45:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:42,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:43,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206192341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:43,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:43,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-03 12:45:43,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657692702] [2021-10-03 12:45:43,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:43,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:43,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:43,147 INFO L87 Difference]: Start difference. First operand 378 states and 1037 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:44,335 INFO L93 Difference]: Finished difference Result 600 states and 1603 transitions. [2021-10-03 12:45:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-03 12:45:44,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21 [2021-10-03 12:45:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:44,340 INFO L225 Difference]: With dead ends: 600 [2021-10-03 12:45:44,340 INFO L226 Difference]: Without dead ends: 582 [2021-10-03 12:45:44,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 971.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-10-03 12:45:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-10-03 12:45:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 378. [2021-10-03 12:45:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.7453580901856762) internal successors, (1035), 377 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1035 transitions. [2021-10-03 12:45:44,353 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1035 transitions. Word has length 21 [2021-10-03 12:45:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:44,353 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1035 transitions. [2021-10-03 12:45:44,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1035 transitions. [2021-10-03 12:45:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:44,355 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:44,355 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:44,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-03 12:45:44,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:44,569 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1989961142, now seen corresponding path program 31 times [2021-10-03 12:45:44,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:44,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470216872] [2021-10-03 12:45:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:44,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:44,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:44,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470216872] [2021-10-03 12:45:44,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470216872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:44,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978834608] [2021-10-03 12:45:44,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:45:44,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:44,766 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:44,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-03 12:45:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:45,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:45,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978834608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:45,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-03 12:45:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536926303] [2021-10-03 12:45:45,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:45:45,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:45:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:45:45,789 INFO L87 Difference]: Start difference. First operand 378 states and 1035 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) [2021-10-03 12:45:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:46,827 INFO L93 Difference]: Finished difference Result 680 states and 1810 transitions. [2021-10-03 12:45:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-03 12:45:46,827 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 21 [2021-10-03 12:45:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:46,831 INFO L225 Difference]: With dead ends: 680 [2021-10-03 12:45:46,831 INFO L226 Difference]: Without dead ends: 658 [2021-10-03 12:45:46,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1379, Unknown=0, NotChecked=0, Total=1640 [2021-10-03 12:45:46,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-10-03 12:45:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 408. [2021-10-03 12:45:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7813267813267815) internal successors, (1132), 407 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1132 transitions. [2021-10-03 12:45:46,845 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1132 transitions. Word has length 21 [2021-10-03 12:45:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:46,845 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1132 transitions. [2021-10-03 12:45:46,846 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) [2021-10-03 12:45:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1132 transitions. [2021-10-03 12:45:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:46,848 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:46,848 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:46,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:47,062 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,SelfDestructingSolverStorable32 [2021-10-03 12:45:47,063 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1612238671, now seen corresponding path program 32 times [2021-10-03 12:45:47,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:47,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857564657] [2021-10-03 12:45:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:47,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:45:47,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857564657] [2021-10-03 12:45:47,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857564657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:47,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027579490] [2021-10-03 12:45:47,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:45:47,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:47,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:47,224 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:47,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-03 12:45:47,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:45:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-03 12:45:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:48,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027579490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:48,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:48,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-03 12:45:48,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108544823] [2021-10-03 12:45:48,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-03 12:45:48,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-03 12:45:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-03 12:45:48,275 INFO L87 Difference]: Start difference. First operand 408 states and 1132 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:48,999 INFO L93 Difference]: Finished difference Result 498 states and 1364 transitions. [2021-10-03 12:45:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-03 12:45:49,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-03 12:45:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:49,004 INFO L225 Difference]: With dead ends: 498 [2021-10-03 12:45:49,004 INFO L226 Difference]: Without dead ends: 476 [2021-10-03 12:45:49,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:45:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-03 12:45:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 408. [2021-10-03 12:45:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7714987714987713) internal successors, (1128), 407 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1128 transitions. [2021-10-03 12:45:49,016 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1128 transitions. Word has length 21 [2021-10-03 12:45:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:49,017 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1128 transitions. [2021-10-03 12:45:49,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1128 transitions. [2021-10-03 12:45:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:49,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:49,019 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:49,052 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 [2021-10-03 12:45:49,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:49,232 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:49,232 INFO L82 PathProgramCache]: Analyzing trace with hash -407109030, now seen corresponding path program 33 times [2021-10-03 12:45:49,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:49,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905371663] [2021-10-03 12:45:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:49,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:49,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:49,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905371663] [2021-10-03 12:45:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905371663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:49,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738221660] [2021-10-03 12:45:49,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:45:49,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:49,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:49,415 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:49,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-03 12:45:50,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-03 12:45:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:50,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:50,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738221660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:50,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:50,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-03 12:45:50,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228488579] [2021-10-03 12:45:50,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:50,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:50,606 INFO L87 Difference]: Start difference. First operand 408 states and 1128 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:51,397 INFO L93 Difference]: Finished difference Result 525 states and 1417 transitions. [2021-10-03 12:45:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:45:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 21 [2021-10-03 12:45:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:51,401 INFO L225 Difference]: With dead ends: 525 [2021-10-03 12:45:51,401 INFO L226 Difference]: Without dead ends: 516 [2021-10-03 12:45:51,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-10-03 12:45:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-10-03 12:45:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 420. [2021-10-03 12:45:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.7732696897374702) internal successors, (1162), 419 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1162 transitions. [2021-10-03 12:45:51,414 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1162 transitions. Word has length 21 [2021-10-03 12:45:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:51,415 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1162 transitions. [2021-10-03 12:45:51,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1162 transitions. [2021-10-03 12:45:51,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-03 12:45:51,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:51,417 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:51,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:51,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:51,632 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:51,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash -865397862, now seen corresponding path program 34 times [2021-10-03 12:45:51,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:51,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221913745] [2021-10-03 12:45:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:51,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:51,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:51,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221913745] [2021-10-03 12:45:51,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221913745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:51,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911624681] [2021-10-03 12:45:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:45:51,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:51,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:51,816 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-03 12:45:52,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:45:52,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:52,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-03 12:45:52,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:53,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911624681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:53,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:53,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-03 12:45:53,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657409180] [2021-10-03 12:45:53,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:45:53,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:45:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:45:53,019 INFO L87 Difference]: Start difference. First operand 420 states and 1162 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) [2021-10-03 12:45:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:53,793 INFO L93 Difference]: Finished difference Result 612 states and 1656 transitions. [2021-10-03 12:45:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:45:53,793 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 21 [2021-10-03 12:45:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:53,797 INFO L225 Difference]: With dead ends: 612 [2021-10-03 12:45:53,797 INFO L226 Difference]: Without dead ends: 590 [2021-10-03 12:45:53,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 693.1ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-10-03 12:45:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-10-03 12:45:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 436. [2021-10-03 12:45:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.786206896551724) internal successors, (1212), 435 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1212 transitions. [2021-10-03 12:45:53,810 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1212 transitions. Word has length 21 [2021-10-03 12:45:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:53,811 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1212 transitions. [2021-10-03 12:45:53,811 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) [2021-10-03 12:45:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1212 transitions. [2021-10-03 12:45:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:45:53,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:53,813 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:53,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:54,027 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,SelfDestructingSolverStorable35 [2021-10-03 12:45:54,028 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash -240278418, now seen corresponding path program 35 times [2021-10-03 12:45:54,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:54,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799199135] [2021-10-03 12:45:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:54,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:45:54,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:54,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799199135] [2021-10-03 12:45:54,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799199135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:54,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703967444] [2021-10-03 12:45:54,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:45:54,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:54,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:54,203 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:54,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-03 12:45:54,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-03 12:45:54,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:45:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:55,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703967444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:55,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:55,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-10-03 12:45:55,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28332712] [2021-10-03 12:45:55,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:55,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:55,468 INFO L87 Difference]: Start difference. First operand 436 states and 1212 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:56,612 INFO L93 Difference]: Finished difference Result 664 states and 1827 transitions. [2021-10-03 12:45:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:45:56,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:45:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:56,617 INFO L225 Difference]: With dead ends: 664 [2021-10-03 12:45:56,617 INFO L226 Difference]: Without dead ends: 642 [2021-10-03 12:45:56,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1008.4ms TimeCoverageRelationStatistics Valid=244, Invalid=1478, Unknown=0, NotChecked=0, Total=1722 [2021-10-03 12:45:56,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-03 12:45:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 456. [2021-10-03 12:45:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.7736263736263735) internal successors, (1262), 455 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1262 transitions. [2021-10-03 12:45:56,631 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1262 transitions. Word has length 23 [2021-10-03 12:45:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:56,632 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1262 transitions. [2021-10-03 12:45:56,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1262 transitions. [2021-10-03 12:45:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:45:56,634 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:56,634 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:56,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:56,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-03 12:45:56,849 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash 112719294, now seen corresponding path program 36 times [2021-10-03 12:45:56,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:56,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107826934] [2021-10-03 12:45:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:56,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:45:57,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:57,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107826934] [2021-10-03 12:45:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107826934] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:57,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172579536] [2021-10-03 12:45:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:45:57,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:57,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:57,005 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:57,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-03 12:45:57,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-03 12:45:57,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:45:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:45:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:45:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:45:58,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172579536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:58,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:45:58,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-10-03 12:45:58,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726976901] [2021-10-03 12:45:58,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:45:58,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:45:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:45:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:45:58,272 INFO L87 Difference]: Start difference. First operand 456 states and 1262 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:45:59,433 INFO L93 Difference]: Finished difference Result 600 states and 1644 transitions. [2021-10-03 12:45:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-03 12:45:59,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:45:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:45:59,438 INFO L225 Difference]: With dead ends: 600 [2021-10-03 12:45:59,438 INFO L226 Difference]: Without dead ends: 578 [2021-10-03 12:45:59,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1008.6ms TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2021-10-03 12:45:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-10-03 12:45:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 356. [2021-10-03 12:45:59,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.7746478873239435) internal successors, (985), 355 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:59,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 985 transitions. [2021-10-03 12:45:59,450 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 985 transitions. Word has length 23 [2021-10-03 12:45:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:45:59,450 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 985 transitions. [2021-10-03 12:45:59,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:45:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 985 transitions. [2021-10-03 12:45:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:45:59,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:45:59,452 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:45:59,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-03 12:45:59,667 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,SelfDestructingSolverStorable37 [2021-10-03 12:45:59,668 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:45:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:45:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2025932931, now seen corresponding path program 37 times [2021-10-03 12:45:59,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:45:59,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095839805] [2021-10-03 12:45:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:45:59,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:45:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:45:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:45:59,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:45:59,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095839805] [2021-10-03 12:45:59,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095839805] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:45:59,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500370543] [2021-10-03 12:45:59,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:45:59,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:45:59,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:45:59,740 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:45:59,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-03 12:46:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-03 12:46:00,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-03 12:46:00,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500370543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:00,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:00,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-03 12:46:00,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635328154] [2021-10-03 12:46:00,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-03 12:46:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:00,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-03 12:46:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:46:00,573 INFO L87 Difference]: Start difference. First operand 356 states and 985 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-10-03 12:46:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:00,602 INFO L93 Difference]: Finished difference Result 460 states and 1212 transitions. [2021-10-03 12:46:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-03 12:46:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:46:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:00,606 INFO L225 Difference]: With dead ends: 460 [2021-10-03 12:46:00,606 INFO L226 Difference]: Without dead ends: 460 [2021-10-03 12:46:00,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-03 12:46:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-03 12:46:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 316. [2021-10-03 12:46:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.7587301587301587) internal successors, (869), 315 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 869 transitions. [2021-10-03 12:46:00,614 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 869 transitions. Word has length 23 [2021-10-03 12:46:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:00,614 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 869 transitions. [2021-10-03 12:46:00,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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) [2021-10-03 12:46:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 869 transitions. [2021-10-03 12:46:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:46:00,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:00,616 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:00,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-03 12:46:00,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:00,830 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2002603838, now seen corresponding path program 38 times [2021-10-03 12:46:00,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:00,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744390335] [2021-10-03 12:46:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:00,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:46:00,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744390335] [2021-10-03 12:46:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744390335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:00,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626755728] [2021-10-03 12:46:00,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:46:00,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:00,997 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:00,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-03 12:46:01,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:46:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:46:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:02,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626755728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:02,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:02,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-10-03 12:46:02,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606254910] [2021-10-03 12:46:02,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:46:02,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:46:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:46:02,232 INFO L87 Difference]: Start difference. First operand 316 states and 869 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:03,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:03,688 INFO L93 Difference]: Finished difference Result 550 states and 1479 transitions. [2021-10-03 12:46:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-03 12:46:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:46:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:03,692 INFO L225 Difference]: With dead ends: 550 [2021-10-03 12:46:03,692 INFO L226 Difference]: Without dead ends: 484 [2021-10-03 12:46:03,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1138.7ms TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2021-10-03 12:46:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-03 12:46:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 408. [2021-10-03 12:46:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7223587223587224) internal successors, (1108), 407 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1108 transitions. [2021-10-03 12:46:03,702 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1108 transitions. Word has length 23 [2021-10-03 12:46:03,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:03,702 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1108 transitions. [2021-10-03 12:46:03,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1108 transitions. [2021-10-03 12:46:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:46:03,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:03,705 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:03,736 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 [2021-10-03 12:46:03,916 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,SelfDestructingSolverStorable39 [2021-10-03 12:46:03,917 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -892996478, now seen corresponding path program 39 times [2021-10-03 12:46:03,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:03,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928298043] [2021-10-03 12:46:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:03,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:46:04,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928298043] [2021-10-03 12:46:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928298043] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:04,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474869121] [2021-10-03 12:46:04,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:46:04,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:04,083 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:04,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-03 12:46:04,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-03 12:46:04,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:04,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:46:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:05,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474869121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:05,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:05,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-03 12:46:05,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534636737] [2021-10-03 12:46:05,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:46:05,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:46:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:46:05,349 INFO L87 Difference]: Start difference. First operand 408 states and 1108 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:06,107 INFO L93 Difference]: Finished difference Result 630 states and 1681 transitions. [2021-10-03 12:46:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-03 12:46:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:46:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:06,112 INFO L225 Difference]: With dead ends: 630 [2021-10-03 12:46:06,112 INFO L226 Difference]: Without dead ends: 600 [2021-10-03 12:46:06,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:46:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-03 12:46:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 414. [2021-10-03 12:46:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.738498789346247) internal successors, (1131), 413 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1131 transitions. [2021-10-03 12:46:06,125 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1131 transitions. Word has length 23 [2021-10-03 12:46:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:06,126 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1131 transitions. [2021-10-03 12:46:06,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1131 transitions. [2021-10-03 12:46:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-03 12:46:06,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:06,128 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:06,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-03 12:46:06,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:06,342 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash 698309458, now seen corresponding path program 40 times [2021-10-03 12:46:06,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:06,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855813747] [2021-10-03 12:46:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:06,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:46:06,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:06,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855813747] [2021-10-03 12:46:06,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855813747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:06,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178796467] [2021-10-03 12:46:06,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:46:06,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:06,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:06,491 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:06,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-03 12:46:07,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:46:07,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:07,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-03 12:46:07,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:07,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178796467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:07,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:07,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-10-03 12:46:07,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848051131] [2021-10-03 12:46:07,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-03 12:46:07,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-03 12:46:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-10-03 12:46:07,803 INFO L87 Difference]: Start difference. First operand 414 states and 1131 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:08,969 INFO L93 Difference]: Finished difference Result 657 states and 1776 transitions. [2021-10-03 12:46:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-03 12:46:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-03 12:46:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:08,973 INFO L225 Difference]: With dead ends: 657 [2021-10-03 12:46:08,973 INFO L226 Difference]: Without dead ends: 600 [2021-10-03 12:46:08,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 991.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-10-03 12:46:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-10-03 12:46:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 370. [2021-10-03 12:46:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.6910569105691056) internal successors, (993), 369 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 993 transitions. [2021-10-03 12:46:08,981 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 993 transitions. Word has length 23 [2021-10-03 12:46:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:08,982 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 993 transitions. [2021-10-03 12:46:08,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 993 transitions. [2021-10-03 12:46:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:08,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:08,983 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:09,013 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 [2021-10-03 12:46:09,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:09,184 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1857681204, now seen corresponding path program 41 times [2021-10-03 12:46:09,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:09,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197950716] [2021-10-03 12:46:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:09,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:09,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:09,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197950716] [2021-10-03 12:46:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197950716] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:09,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988594928] [2021-10-03 12:46:09,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:46:09,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:09,254 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:09,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-03 12:46:10,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:46:10,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:10,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:10,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988594928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:10,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:10,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 19 [2021-10-03 12:46:10,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261221726] [2021-10-03 12:46:10,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-03 12:46:10,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-03 12:46:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-03 12:46:10,591 INFO L87 Difference]: Start difference. First operand 370 states and 993 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:11,234 INFO L93 Difference]: Finished difference Result 606 states and 1587 transitions. [2021-10-03 12:46:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-03 12:46:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:11,239 INFO L225 Difference]: With dead ends: 606 [2021-10-03 12:46:11,239 INFO L226 Difference]: Without dead ends: 606 [2021-10-03 12:46:11,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-10-03 12:46:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-10-03 12:46:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 450. [2021-10-03 12:46:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.683741648106904) internal successors, (1205), 449 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1205 transitions. [2021-10-03 12:46:11,252 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1205 transitions. Word has length 25 [2021-10-03 12:46:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:11,253 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1205 transitions. [2021-10-03 12:46:11,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1205 transitions. [2021-10-03 12:46:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:11,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:11,255 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:11,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-03 12:46:11,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:11,470 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash 504171361, now seen corresponding path program 42 times [2021-10-03 12:46:11,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:11,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091004767] [2021-10-03 12:46:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:11,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:46:11,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091004767] [2021-10-03 12:46:11,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091004767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:11,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040936041] [2021-10-03 12:46:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-03 12:46:11,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:11,676 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:11,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-03 12:46:12,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-03 12:46:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:13,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040936041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:13,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:13,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-10-03 12:46:13,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746047096] [2021-10-03 12:46:13,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:46:13,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:13,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:46:13,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:46:13,097 INFO L87 Difference]: Start difference. First operand 450 states and 1205 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:14,684 INFO L93 Difference]: Finished difference Result 790 states and 2070 transitions. [2021-10-03 12:46:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-03 12:46:14,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:14,689 INFO L225 Difference]: With dead ends: 790 [2021-10-03 12:46:14,689 INFO L226 Difference]: Without dead ends: 702 [2021-10-03 12:46:14,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1412.9ms TimeCoverageRelationStatistics Valid=344, Invalid=2736, Unknown=0, NotChecked=0, Total=3080 [2021-10-03 12:46:14,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-10-03 12:46:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 580. [2021-10-03 12:46:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.6632124352331608) internal successors, (1542), 579 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1542 transitions. [2021-10-03 12:46:14,701 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1542 transitions. Word has length 25 [2021-10-03 12:46:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:14,701 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1542 transitions. [2021-10-03 12:46:14,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1542 transitions. [2021-10-03 12:46:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:14,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:14,703 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:14,732 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 [2021-10-03 12:46:14,903 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,SelfDestructingSolverStorable43 [2021-10-03 12:46:14,904 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:14,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:14,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1613778721, now seen corresponding path program 43 times [2021-10-03 12:46:14,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:14,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729171457] [2021-10-03 12:46:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:14,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:46:15,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:15,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729171457] [2021-10-03 12:46:15,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729171457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:15,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079955097] [2021-10-03 12:46:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-03 12:46:15,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:15,100 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:15,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-03 12:46:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:16,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079955097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:16,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:16,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-10-03 12:46:16,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657063928] [2021-10-03 12:46:16,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:46:16,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:46:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:46:16,605 INFO L87 Difference]: Start difference. First operand 580 states and 1542 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:17,408 INFO L93 Difference]: Finished difference Result 870 states and 2279 transitions. [2021-10-03 12:46:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-03 12:46:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:17,415 INFO L225 Difference]: With dead ends: 870 [2021-10-03 12:46:17,416 INFO L226 Difference]: Without dead ends: 840 [2021-10-03 12:46:17,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-10-03 12:46:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-10-03 12:46:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 578. [2021-10-03 12:46:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.6707105719237436) internal successors, (1541), 577 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1541 transitions. [2021-10-03 12:46:17,430 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1541 transitions. Word has length 25 [2021-10-03 12:46:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:17,430 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1541 transitions. [2021-10-03 12:46:17,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1541 transitions. [2021-10-03 12:46:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:17,432 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:17,432 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:17,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-03 12:46:17,646 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,SelfDestructingSolverStorable44 [2021-10-03 12:46:17,647 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:17,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1089882639, now seen corresponding path program 44 times [2021-10-03 12:46:17,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:17,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427984873] [2021-10-03 12:46:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:17,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:46:17,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427984873] [2021-10-03 12:46:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427984873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995145951] [2021-10-03 12:46:17,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-03 12:46:17,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:17,827 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-03 12:46:17,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-03 12:46:18,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-03 12:46:18,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:18,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:18,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:19,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995145951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:19,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:19,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-10-03 12:46:19,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376692084] [2021-10-03 12:46:19,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-03 12:46:19,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-03 12:46:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-10-03 12:46:19,338 INFO L87 Difference]: Start difference. First operand 578 states and 1541 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:20,764 INFO L93 Difference]: Finished difference Result 941 states and 2482 transitions. [2021-10-03 12:46:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-03 12:46:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:20,772 INFO L225 Difference]: With dead ends: 941 [2021-10-03 12:46:20,773 INFO L226 Difference]: Without dead ends: 880 [2021-10-03 12:46:20,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1215.5ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-10-03 12:46:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-10-03 12:46:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 554. [2021-10-03 12:46:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.6491862567811935) internal successors, (1465), 553 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1465 transitions. [2021-10-03 12:46:20,787 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1465 transitions. Word has length 25 [2021-10-03 12:46:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:20,787 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1465 transitions. [2021-10-03 12:46:20,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1465 transitions. [2021-10-03 12:46:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:20,789 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:20,789 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:20,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-03 12:46:20,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:20,990 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:20,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:20,991 INFO L82 PathProgramCache]: Analyzing trace with hash 857169073, now seen corresponding path program 45 times [2021-10-03 12:46:20,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:20,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459433457] [2021-10-03 12:46:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:20,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-03 12:46:21,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:21,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459433457] [2021-10-03 12:46:21,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459433457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:21,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757462046] [2021-10-03 12:46:21,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-03 12:46:21,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:21,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:21,199 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) [2021-10-03 12:46:21,202 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 [2021-10-03 12:46:22,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-03 12:46:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:22,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757462046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:22,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:22,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-03 12:46:22,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049058116] [2021-10-03 12:46:22,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:46:22,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:46:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:46:22,717 INFO L87 Difference]: Start difference. First operand 554 states and 1465 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:24,284 INFO L93 Difference]: Finished difference Result 660 states and 1689 transitions. [2021-10-03 12:46:24,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-03 12:46:24,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:24,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:24,288 INFO L225 Difference]: With dead ends: 660 [2021-10-03 12:46:24,288 INFO L226 Difference]: Without dead ends: 578 [2021-10-03 12:46:24,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1397.9ms TimeCoverageRelationStatistics Valid=336, Invalid=2634, Unknown=0, NotChecked=0, Total=2970 [2021-10-03 12:46:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-10-03 12:46:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 474. [2021-10-03 12:46:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.5813953488372094) internal successors, (1221), 473 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1221 transitions. [2021-10-03 12:46:24,301 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1221 transitions. Word has length 25 [2021-10-03 12:46:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1221 transitions. [2021-10-03 12:46:24,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1221 transitions. [2021-10-03 12:46:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:24,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:24,304 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:24,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-03 12:46:24,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-03 12:46:24,520 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1966776433, now seen corresponding path program 46 times [2021-10-03 12:46:24,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:24,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206004762] [2021-10-03 12:46:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:24,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-03 12:46:24,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:24,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206004762] [2021-10-03 12:46:24,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206004762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:24,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505828270] [2021-10-03 12:46:24,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-03 12:46:24,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:24,725 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) [2021-10-03 12:46:24,726 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 [2021-10-03 12:46:25,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-03 12:46:25,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:26,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505828270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:26,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:26,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-10-03 12:46:26,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170252017] [2021-10-03 12:46:26,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:46:26,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:46:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:46:26,319 INFO L87 Difference]: Start difference. First operand 474 states and 1221 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:27,405 INFO L93 Difference]: Finished difference Result 682 states and 1740 transitions. [2021-10-03 12:46:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-03 12:46:27,406 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:27,412 INFO L225 Difference]: With dead ends: 682 [2021-10-03 12:46:27,412 INFO L226 Difference]: Without dead ends: 660 [2021-10-03 12:46:27,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1022.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2021-10-03 12:46:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-10-03 12:46:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 348. [2021-10-03 12:46:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.547550432276657) internal successors, (884), 347 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 884 transitions. [2021-10-03 12:46:27,419 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 884 transitions. Word has length 25 [2021-10-03 12:46:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:27,420 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 884 transitions. [2021-10-03 12:46:27,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 884 transitions. [2021-10-03 12:46:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-03 12:46:27,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-03 12:46:27,421 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-03 12:46:27,448 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 [2021-10-03 12:46:27,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:27,622 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-03 12:46:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-03 12:46:27,623 INFO L82 PathProgramCache]: Analyzing trace with hash -736884927, now seen corresponding path program 47 times [2021-10-03 12:46:27,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-03 12:46:27,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885443301] [2021-10-03 12:46:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-03 12:46:27,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-03 12:46:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-03 12:46:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-03 12:46:27,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-03 12:46:27,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885443301] [2021-10-03 12:46:27,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885443301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:27,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036572350] [2021-10-03 12:46:27,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-03 12:46:27,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-03 12:46:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-03 12:46:27,826 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) [2021-10-03 12:46:27,829 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 [2021-10-03 12:46:28,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-03 12:46:28,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-03 12:46:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-03 12:46:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-03 12:46:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-03 12:46:29,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036572350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-03 12:46:29,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-03 12:46:29,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-10-03 12:46:29,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182089198] [2021-10-03 12:46:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-03 12:46:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-03 12:46:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-03 12:46:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-10-03 12:46:29,415 INFO L87 Difference]: Start difference. First operand 348 states and 884 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-03 12:46:30,559 INFO L93 Difference]: Finished difference Result 394 states and 997 transitions. [2021-10-03 12:46:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-03 12:46:30,560 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-03 12:46:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-03 12:46:30,561 INFO L225 Difference]: With dead ends: 394 [2021-10-03 12:46:30,561 INFO L226 Difference]: Without dead ends: 0 [2021-10-03 12:46:30,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1089.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-10-03 12:46:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-03 12:46:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-03 12:46:30,562 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) [2021-10-03 12:46:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-03 12:46:30,562 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-10-03 12:46:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-03 12:46:30,562 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-03 12:46:30,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-03 12:46:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-03 12:46:30,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-03 12:46:30,566 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-03 12:46:30,567 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-03 12:46:30,567 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-03 12:46:30,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-03 12:46:30,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-03 12:46:30,787 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-03 12:46:30,787 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-03 12:46:30,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 12:46:30 BasicIcfg [2021-10-03 12:46:30,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-03 12:46:30,789 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-03 12:46:30,790 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-03 12:46:30,790 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-03 12:46:30,790 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 12:44:50" (3/4) ... [2021-10-03 12:46:30,794 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-03 12:46:30,801 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-03 12:46:30,801 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-03 12:46:30,807 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-03 12:46:30,808 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:46:30,808 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-03 12:46:30,846 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-03 12:46:30,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-03 12:46:30,848 INFO L168 Benchmark]: Toolchain (without parser) took 100971.74 ms. Allocated memory was 54.5 MB in the beginning and 371.2 MB in the end (delta: 316.7 MB). Free memory was 30.4 MB in the beginning and 229.5 MB in the end (delta: -199.1 MB). Peak memory consumption was 121.5 MB. Max. memory is 16.1 GB. [2021-10-03 12:46:30,848 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:46:30,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.76 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 35.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-10-03 12:46:30,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.34 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 34.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-03 12:46:30,850 INFO L168 Benchmark]: Boogie Preprocessor took 27.66 ms. Allocated memory is still 54.5 MB. Free memory was 34.1 MB in the beginning and 33.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-03 12:46:30,850 INFO L168 Benchmark]: RCFGBuilder took 569.32 ms. Allocated memory is still 54.5 MB. Free memory was 32.9 MB in the beginning and 33.6 MB in the end (delta: -655.2 kB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-10-03 12:46:30,851 INFO L168 Benchmark]: TraceAbstraction took 100010.25 ms. Allocated memory was 54.5 MB in the beginning and 371.2 MB in the end (delta: 316.7 MB). Free memory was 33.2 MB in the beginning and 232.0 MB in the end (delta: -198.8 MB). Peak memory consumption was 118.3 MB. Max. memory is 16.1 GB. [2021-10-03 12:46:30,851 INFO L168 Benchmark]: Witness Printer took 56.67 ms. Allocated memory is still 371.2 MB. Free memory was 232.0 MB in the beginning and 229.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-03 12:46:30,853 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 54.5 MB. Free memory was 34.8 MB in the beginning and 34.7 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.76 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 35.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.34 ms. Allocated memory is still 54.5 MB. Free memory was 35.6 MB in the beginning and 34.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.66 ms. Allocated memory is still 54.5 MB. Free memory was 34.1 MB in the beginning and 33.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 569.32 ms. Allocated memory is still 54.5 MB. Free memory was 32.9 MB in the beginning and 33.6 MB in the end (delta: -655.2 kB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 100010.25 ms. Allocated memory was 54.5 MB in the beginning and 371.2 MB in the end (delta: 316.7 MB). Free memory was 33.2 MB in the beginning and 232.0 MB in the end (delta: -198.8 MB). Peak memory consumption was 118.3 MB. Max. memory is 16.1 GB. * Witness Printer took 56.67 ms. Allocated memory is still 371.2 MB. Free memory was 232.0 MB in the beginning and 229.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2346.8ms, 71 PlacesBefore, 23 PlacesAfterwards, 71 TransitionsBefore, 19 TransitionsAfterwards, 282 CoEnabledTransitionPairs, 6 FixpointIterations, 43 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 546 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 451, positive: 425, positive conditional: 0, positive unconditional: 425, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 191, positive: 188, positive conditional: 0, positive unconditional: 188, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 191, positive: 182, positive conditional: 0, positive unconditional: 182, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 9, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 24, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 451, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 23, negative conditional: 0, negative unconditional: 23, unknown: 191, unknown conditional: 0, unknown unconditional: 191] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 58]: 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, 77 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 99893.5ms, OverallIterations: 49, TraceHistogramMax: 4, EmptinessCheckTime: 82.2ms, AutomataDifference: 36152.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2402.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1124 SDtfs, 4661 SDslu, 9873 SDs, 0 SdLazy, 21120 SolverSat, 1283 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11532.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2112 GetRequests, 594 SyntacticMatches, 20 SemanticMatches, 1498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13400 ImplicationChecksByTransitivity, 31342.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=580occurred in iteration=44, InterpolantAutomatonStates: 1078, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 570.0ms AutomataMinimizationTime, 49 MinimizatonAttempts, 5706 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 292.9ms SsaConstructionTime, 1492.6ms SatisfiabilityAnalysisTime, 26395.2ms InterpolantComputationTime, 1967 NumberOfCodeBlocks, 1967 NumberOfCodeBlocksAsserted, 179 NumberOfCheckSat, 1872 ConstructedInterpolants, 0 QuantifiedInterpolants, 25973 SizeOfPredicates, 94 NumberOfNonLiveVariables, 4689 ConjunctsInSsa, 1418 ConjunctsInUnsatCore, 95 InterpolantComputations, 3 PerfectInterpolantSequences, 128/1289 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! [2021-10-03 12:46:30,903 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...