./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 36e808a478defaa615c1ab442b873bf1dcf0755619d70dbdef8cf1e327b14b9e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:47:32,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:47:32,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:47:32,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:47:32,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:47:32,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:47:32,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:47:32,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:47:32,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:47:32,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:47:32,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:47:32,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:47:32,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:47:32,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:47:32,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:47:32,206 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:47:32,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:47:32,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:47:32,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:47:32,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:47:32,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:47:32,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:47:32,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:47:32,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:47:32,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:47:32,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:47:32,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:47:32,235 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:47:32,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:47:32,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:47:32,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:47:32,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:47:32,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:47:32,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:47:32,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:47:32,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:47:32,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:47:32,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:47:32,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:47:32,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:47:32,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:47:32,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 18:47:32,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:47:32,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:47:32,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:47:32,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:47:32,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:47:32,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:47:32,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:47:32,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:47:32,304 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:47:32,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:47:32,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:47:32,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:47:32,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:47:32,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:47:32,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:47:32,308 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:47:32,308 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:47:32,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:47:32,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:47:32,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:47:32,309 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:47:32,310 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:47:32,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:47:32,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:47:32,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:47:32,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:47:32,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:47:32,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:47:32,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:47:32,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:47:32,314 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36e808a478defaa615c1ab442b873bf1dcf0755619d70dbdef8cf1e327b14b9e [2022-11-18 18:47:32,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:47:32,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:47:32,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:47:32,721 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:47:32,722 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:47:32,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/fib_unsafe-5.i [2022-11-18 18:47:32,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/data/1786631df/2f6555c4aee14ce4b71e2c5ad0e426fe/FLAGa4eb7bd45 [2022-11-18 18:47:33,541 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:47:33,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/sv-benchmarks/c/pthread/fib_unsafe-5.i [2022-11-18 18:47:33,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/data/1786631df/2f6555c4aee14ce4b71e2c5ad0e426fe/FLAGa4eb7bd45 [2022-11-18 18:47:33,738 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/data/1786631df/2f6555c4aee14ce4b71e2c5ad0e426fe [2022-11-18 18:47:33,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:47:33,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:47:33,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:47:33,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:47:33,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:47:33,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:47:33" (1/1) ... [2022-11-18 18:47:33,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24708e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:33, skipping insertion in model container [2022-11-18 18:47:33,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:47:33" (1/1) ... [2022-11-18 18:47:33,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:47:33,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:47:34,441 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2022-11-18 18:47:34,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:47:34,491 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:47:34,552 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/sv-benchmarks/c/pthread/fib_unsafe-5.i[30243,30256] [2022-11-18 18:47:34,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:47:34,621 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:47:34,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34 WrapperNode [2022-11-18 18:47:34,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:47:34,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:47:34,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:47:34,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:47:34,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,708 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-18 18:47:34,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:47:34,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:47:34,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:47:34,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:47:34,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,767 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:47:34,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:47:34,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:47:34,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:47:34,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (1/1) ... [2022-11-18 18:47:34,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:47:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:34,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:47:34,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:47:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:47:34,882 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:47:34,882 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:47:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:47:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:47:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:47:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:47:34,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:47:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:47:34,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:47:34,886 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:47:35,141 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:47:35,144 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:47:35,509 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:47:35,517 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:47:35,518 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:47:35,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:47:35 BoogieIcfgContainer [2022-11-18 18:47:35,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:47:35,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:47:35,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:47:35,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:47:35,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:47:33" (1/3) ... [2022-11-18 18:47:35,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689f0b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:47:35, skipping insertion in model container [2022-11-18 18:47:35,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:47:34" (2/3) ... [2022-11-18 18:47:35,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689f0b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:47:35, skipping insertion in model container [2022-11-18 18:47:35,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:47:35" (3/3) ... [2022-11-18 18:47:35,533 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2022-11-18 18:47:35,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:47:35,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-18 18:47:35,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:47:35,627 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:47:35,668 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 18:47:35,689 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-18 18:47:35,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-18 18:47:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-18 18:47:35,798 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-18 18:47:35,798 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:47:35,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-18 18:47:35,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-18 18:47:41,286 INFO L134 LiptonReduction]: Checked pairs total: 1734 [2022-11-18 18:47:41,286 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-18 18:47:41,296 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-18 18:47:41,316 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:47:41,346 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2278bb6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:47:41,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 18:47:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-18 18:47:41,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:41,356 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-18 18:47:41,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:41,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:41,363 INFO L85 PathProgramCache]: Analyzing trace with hash 416, now seen corresponding path program 1 times [2022-11-18 18:47:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:41,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787420260] [2022-11-18 18:47:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:41,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:41,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787420260] [2022-11-18 18:47:41,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787420260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:41,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:41,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-18 18:47:41,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836988848] [2022-11-18 18:47:41,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:47:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:47:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:47:41,548 INFO L87 Difference]: Start difference. First operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:41,616 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-18 18:47:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:47:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-18 18:47:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:41,635 INFO L225 Difference]: With dead ends: 50 [2022-11-18 18:47:41,635 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 18:47:41,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:47:41,644 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:41,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 18:47:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 18:47:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 49 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-18 18:47:41,691 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-18 18:47:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:41,692 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-18 18:47:41,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-18 18:47:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:47:41,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:41,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:47:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:47:41,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 410520, now seen corresponding path program 1 times [2022-11-18 18:47:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654847665] [2022-11-18 18:47:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654847665] [2022-11-18 18:47:42,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654847665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:42,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:42,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:47:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135356760] [2022-11-18 18:47:42,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:42,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:42,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:42,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:42,038 INFO L87 Difference]: Start difference. First operand 50 states and 134 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:42,108 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-18 18:47:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-18 18:47:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:42,113 INFO L225 Difference]: With dead ends: 47 [2022-11-18 18:47:42,115 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 18:47:42,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:42,118 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:42,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 18:47:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-18 18:47:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 2.909090909090909) internal successors, (128), 46 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-18 18:47:42,138 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-18 18:47:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:42,140 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-18 18:47:42,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-18 18:47:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:47:42,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:42,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:47:42,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:47:42,142 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash 410521, now seen corresponding path program 1 times [2022-11-18 18:47:42,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:42,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534044059] [2022-11-18 18:47:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534044059] [2022-11-18 18:47:42,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534044059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:42,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:42,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:47:42,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240239885] [2022-11-18 18:47:42,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:42,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:42,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:42,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:42,295 INFO L87 Difference]: Start difference. First operand 47 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:42,331 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-18 18:47:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-18 18:47:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:42,334 INFO L225 Difference]: With dead ends: 44 [2022-11-18 18:47:42,334 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 18:47:42,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:42,336 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:42,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 18:47:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-18 18:47:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-18 18:47:42,345 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-18 18:47:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:42,345 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-18 18:47:42,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-18 18:47:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:47:42,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:42,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:47:42,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:47:42,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:42,349 INFO L85 PathProgramCache]: Analyzing trace with hash -654854385, now seen corresponding path program 1 times [2022-11-18 18:47:42,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:42,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321419901] [2022-11-18 18:47:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:42,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:42,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321419901] [2022-11-18 18:47:42,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321419901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:47:42,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:47:42,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:47:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606967017] [2022-11-18 18:47:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:47:42,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:47:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:47:42,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:42,431 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:42,481 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-18 18:47:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:47:42,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-18 18:47:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:42,485 INFO L225 Difference]: With dead ends: 53 [2022-11-18 18:47:42,485 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 18:47:42,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:47:42,490 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:42,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:47:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 18:47:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 18:47:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-18 18:47:42,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-18 18:47:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:42,515 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-18 18:47:42,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-18 18:47:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:47:42,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:42,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:42,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:47:42,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1174350712, now seen corresponding path program 1 times [2022-11-18 18:47:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854025682] [2022-11-18 18:47:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:42,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854025682] [2022-11-18 18:47:42,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854025682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:42,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996002550] [2022-11-18 18:47:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:42,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:42,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:42,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:42,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:47:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:42,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:47:42,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996002550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:42,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 18:47:42,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364821478] [2022-11-18 18:47:42,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:42,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:47:42,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:47:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:47:42,957 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:43,108 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-18 18:47:43,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:47:43,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 7 [2022-11-18 18:47:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:43,110 INFO L225 Difference]: With dead ends: 80 [2022-11-18 18:47:43,110 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 18:47:43,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:47:43,111 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:43,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:47:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 18:47:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-18 18:47:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.948717948717949) internal successors, (230), 79 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-18 18:47:43,124 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-18 18:47:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-18 18:47:43,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-18 18:47:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:47:43,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:43,139 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:43,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:43,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:43,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1721366193, now seen corresponding path program 2 times [2022-11-18 18:47:43,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:43,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889493397] [2022-11-18 18:47:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:43,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:43,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889493397] [2022-11-18 18:47:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889493397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769887637] [2022-11-18 18:47:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:47:43,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:43,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:43,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:43,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:47:43,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:47:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:47:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:43,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:43,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769887637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:43,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:43,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 18:47:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273470471] [2022-11-18 18:47:43,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:47:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:47:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:47:43,850 INFO L87 Difference]: Start difference. First operand 80 states and 230 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:44,083 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-18 18:47:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:47:44,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 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 10 [2022-11-18 18:47:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:44,086 INFO L225 Difference]: With dead ends: 134 [2022-11-18 18:47:44,088 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 18:47:44,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:47:44,090 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:44,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:47:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 18:47:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-18 18:47:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 133 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-18 18:47:44,112 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-18 18:47:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:44,112 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-18 18:47:44,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:44,113 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-18 18:47:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 18:47:44,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:44,126 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:44,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:47:44,333 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 109095087, now seen corresponding path program 3 times [2022-11-18 18:47:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:44,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811674477] [2022-11-18 18:47:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:44,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811674477] [2022-11-18 18:47:44,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811674477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:44,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373277839] [2022-11-18 18:47:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:44,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:44,658 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:44,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:47:44,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:47:44,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:47:44,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:44,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373277839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:45,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:45,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-11-18 18:47:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532733573] [2022-11-18 18:47:45,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:45,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 18:47:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 18:47:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:47:45,082 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:45,300 INFO L93 Difference]: Finished difference Result 152 states and 446 transitions. [2022-11-18 18:47:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:47:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 18:47:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:45,311 INFO L225 Difference]: With dead ends: 152 [2022-11-18 18:47:45,316 INFO L226 Difference]: Without dead ends: 152 [2022-11-18 18:47:45,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-11-18 18:47:45,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:45,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:47:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-18 18:47:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-18 18:47:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 2.973333333333333) internal successors, (446), 151 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 446 transitions. [2022-11-18 18:47:45,344 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 446 transitions. Word has length 16 [2022-11-18 18:47:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:45,345 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 446 transitions. [2022-11-18 18:47:45,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 446 transitions. [2022-11-18 18:47:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 18:47:45,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:45,349 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:45,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:47:45,560 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:47:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1761168847, now seen corresponding path program 4 times [2022-11-18 18:47:45,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:45,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240283053] [2022-11-18 18:47:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:46,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240283053] [2022-11-18 18:47:46,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240283053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237297806] [2022-11-18 18:47:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:47:46,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:46,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:46,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:46,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:47:46,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:47:46,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:47:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:47,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:48,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237297806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:48,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:48,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-11-18 18:47:48,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72098787] [2022-11-18 18:47:48,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:48,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 18:47:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:48,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 18:47:48,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 18:47:48,697 INFO L87 Difference]: Start difference. First operand 152 states and 446 transitions. Second operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:04,382 INFO L93 Difference]: Finished difference Result 7391 states and 21955 transitions. [2022-11-18 18:48:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-11-18 18:48:04,383 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 18:48:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:04,442 INFO L225 Difference]: With dead ends: 7391 [2022-11-18 18:48:04,443 INFO L226 Difference]: Without dead ends: 7391 [2022-11-18 18:48:04,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13953 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=7254, Invalid=25688, Unknown=0, NotChecked=0, Total=32942 [2022-11-18 18:48:04,452 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1737 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1825 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:04,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1737 Valid, 0 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1825 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 18:48:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2022-11-18 18:48:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 5515. [2022-11-18 18:48:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5515 states, 5513 states have (on average 3.321422093234174) internal successors, (18311), 5514 states have internal predecessors, (18311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5515 states to 5515 states and 18311 transitions. [2022-11-18 18:48:04,860 INFO L78 Accepts]: Start accepts. Automaton has 5515 states and 18311 transitions. Word has length 18 [2022-11-18 18:48:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:04,863 INFO L495 AbstractCegarLoop]: Abstraction has 5515 states and 18311 transitions. [2022-11-18 18:48:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5515 states and 18311 transitions. [2022-11-18 18:48:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 18:48:04,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:04,886 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:04,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:05,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:05,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:48:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1761168852, now seen corresponding path program 1 times [2022-11-18 18:48:05,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:05,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980758617] [2022-11-18 18:48:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:05,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 18:48:05,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:05,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980758617] [2022-11-18 18:48:05,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980758617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:05,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:48:05,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:48:05,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824091874] [2022-11-18 18:48:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:05,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:48:05,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:05,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:48:05,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:48:05,502 INFO L87 Difference]: Start difference. First operand 5515 states and 18311 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:05,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:05,565 INFO L93 Difference]: Finished difference Result 5506 states and 17596 transitions. [2022-11-18 18:48:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:48:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 18:48:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:05,607 INFO L225 Difference]: With dead ends: 5506 [2022-11-18 18:48:05,608 INFO L226 Difference]: Without dead ends: 5492 [2022-11-18 18:48:05,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:48:05,609 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:05,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 18:48:05,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2022-11-18 18:48:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5402. [2022-11-18 18:48:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5401 states have (on average 3.2334752823551196) internal successors, (17464), 5401 states have internal predecessors, (17464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 17464 transitions. [2022-11-18 18:48:05,975 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 17464 transitions. Word has length 18 [2022-11-18 18:48:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:05,975 INFO L495 AbstractCegarLoop]: Abstraction has 5402 states and 17464 transitions. [2022-11-18 18:48:05,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 17464 transitions. [2022-11-18 18:48:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 18:48:05,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:05,993 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:05,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:48:05,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:48:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1070964170, now seen corresponding path program 1 times [2022-11-18 18:48:05,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:05,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028181124] [2022-11-18 18:48:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:05,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:06,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:06,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028181124] [2022-11-18 18:48:06,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028181124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:06,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88735940] [2022-11-18 18:48:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:06,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:06,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:06,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:06,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:48:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:06,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 18:48:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:06,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:48:06,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88735940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:48:06,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:48:06,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [15] total 16 [2022-11-18 18:48:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542954613] [2022-11-18 18:48:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:48:06,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 18:48:06,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:06,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 18:48:06,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:48:06,510 INFO L87 Difference]: Start difference. First operand 5402 states and 17464 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:06,849 INFO L93 Difference]: Finished difference Result 5492 states and 16858 transitions. [2022-11-18 18:48:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 18:48:06,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 18:48:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:06,982 INFO L225 Difference]: With dead ends: 5492 [2022-11-18 18:48:06,982 INFO L226 Difference]: Without dead ends: 5400 [2022-11-18 18:48:06,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:48:06,983 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:06,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:48:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-11-18 18:48:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 614. [2022-11-18 18:48:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.911908646003263) internal successors, (1785), 613 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1785 transitions. [2022-11-18 18:48:07,064 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1785 transitions. Word has length 21 [2022-11-18 18:48:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:07,064 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 1785 transitions. [2022-11-18 18:48:07,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1785 transitions. [2022-11-18 18:48:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 18:48:07,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:07,067 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:07,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:07,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:48:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1070964635, now seen corresponding path program 2 times [2022-11-18 18:48:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444236049] [2022-11-18 18:48:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:08,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444236049] [2022-11-18 18:48:08,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444236049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401148082] [2022-11-18 18:48:08,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:48:08,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:08,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:08,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:48:08,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:48:08,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:48:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 18:48:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:09,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401148082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:10,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:10,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-18 18:48:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713538973] [2022-11-18 18:48:10,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 18:48:10,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:10,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 18:48:10,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 18:48:10,558 INFO L87 Difference]: Start difference. First operand 614 states and 1785 transitions. Second operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:48:35,038 INFO L93 Difference]: Finished difference Result 7665 states and 22084 transitions. [2022-11-18 18:48:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-18 18:48:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 18:48:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:48:35,071 INFO L225 Difference]: With dead ends: 7665 [2022-11-18 18:48:35,071 INFO L226 Difference]: Without dead ends: 7601 [2022-11-18 18:48:35,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19998 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=13628, Invalid=36772, Unknown=0, NotChecked=0, Total=50400 [2022-11-18 18:48:35,082 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1665 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3156 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 3156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:48:35,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 0 Invalid, 3637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 3156 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 18:48:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2022-11-18 18:48:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 1024. [2022-11-18 18:48:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.1270772238514173) internal successors, (3199), 1023 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3199 transitions. [2022-11-18 18:48:35,201 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3199 transitions. Word has length 21 [2022-11-18 18:48:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:48:35,202 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 3199 transitions. [2022-11-18 18:48:35,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:48:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3199 transitions. [2022-11-18 18:48:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 18:48:35,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:48:35,206 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:48:35,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:48:35,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:48:35,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:48:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:48:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1303239285, now seen corresponding path program 1 times [2022-11-18 18:48:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:48:35,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649495409] [2022-11-18 18:48:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:48:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:36,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:48:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649495409] [2022-11-18 18:48:36,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649495409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:48:36,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660699258] [2022-11-18 18:48:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:48:36,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:48:36,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:48:36,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:48:36,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:48:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:48:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 18:48:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:48:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:37,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:48:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:48:38,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660699258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:48:38,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:48:38,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-18 18:48:38,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250264424] [2022-11-18 18:48:38,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:48:38,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 18:48:38,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:48:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 18:48:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 18:48:38,401 INFO L87 Difference]: Start difference. First operand 1024 states and 3199 transitions. Second operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:02,608 INFO L93 Difference]: Finished difference Result 8715 states and 25530 transitions. [2022-11-18 18:49:02,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-11-18 18:49:02,609 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 18:49:02,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:02,648 INFO L225 Difference]: With dead ends: 8715 [2022-11-18 18:49:02,649 INFO L226 Difference]: Without dead ends: 8652 [2022-11-18 18:49:02,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19928 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=13628, Invalid=36772, Unknown=0, NotChecked=0, Total=50400 [2022-11-18 18:49:02,655 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1632 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2995 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:02,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 0 Invalid, 3466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2995 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 18:49:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8652 states. [2022-11-18 18:49:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8652 to 1368. [2022-11-18 18:49:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 3.2487198244330653) internal successors, (4441), 1367 states have internal predecessors, (4441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4441 transitions. [2022-11-18 18:49:02,808 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4441 transitions. Word has length 21 [2022-11-18 18:49:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:02,809 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 4441 transitions. [2022-11-18 18:49:02,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4441 transitions. [2022-11-18 18:49:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 18:49:02,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:02,814 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:02,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:03,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 18:49:03,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:49:03,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1246329802, now seen corresponding path program 1 times [2022-11-18 18:49:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:03,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926079808] [2022-11-18 18:49:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926079808] [2022-11-18 18:49:03,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926079808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351958502] [2022-11-18 18:49:03,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:03,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:03,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:03,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:49:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 18:49:04,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:04,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:05,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351958502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:05,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:05,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-18 18:49:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725778232] [2022-11-18 18:49:05,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:05,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 18:49:05,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 18:49:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 18:49:05,859 INFO L87 Difference]: Start difference. First operand 1368 states and 4441 transitions. Second operand has 47 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:49:32,343 INFO L93 Difference]: Finished difference Result 17014 states and 52464 transitions. [2022-11-18 18:49:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-18 18:49:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 18:49:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:49:32,413 INFO L225 Difference]: With dead ends: 17014 [2022-11-18 18:49:32,413 INFO L226 Difference]: Without dead ends: 16966 [2022-11-18 18:49:32,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31037 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=16311, Invalid=56859, Unknown=0, NotChecked=0, Total=73170 [2022-11-18 18:49:32,423 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1450 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4287 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 4287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:49:32,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 0 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 4287 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 18:49:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2022-11-18 18:49:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 2632. [2022-11-18 18:49:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 3.4792854427974156) internal successors, (9154), 2631 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 9154 transitions. [2022-11-18 18:49:32,896 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 9154 transitions. Word has length 22 [2022-11-18 18:49:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:49:32,896 INFO L495 AbstractCegarLoop]: Abstraction has 2632 states and 9154 transitions. [2022-11-18 18:49:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:49:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 9154 transitions. [2022-11-18 18:49:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 18:49:32,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:49:32,908 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:49:32,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:49:33,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:49:33,119 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:49:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:49:33,120 INFO L85 PathProgramCache]: Analyzing trace with hash 735794664, now seen corresponding path program 2 times [2022-11-18 18:49:33,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:49:33,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662414726] [2022-11-18 18:49:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:49:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:49:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:49:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:34,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:49:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662414726] [2022-11-18 18:49:34,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662414726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:49:34,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967448273] [2022-11-18 18:49:34,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:49:34,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:49:34,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:49:34,037 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:49:34,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:49:34,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:49:34,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:49:34,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 18:49:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:49:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:34,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:49:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:49:35,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967448273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:49:35,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:49:35,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-18 18:49:35,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391151267] [2022-11-18 18:49:35,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:49:35,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 18:49:35,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:49:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 18:49:35,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 18:49:35,878 INFO L87 Difference]: Start difference. First operand 2632 states and 9154 transitions. Second operand has 47 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:03,075 INFO L93 Difference]: Finished difference Result 21936 states and 68955 transitions. [2022-11-18 18:50:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-18 18:50:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 18:50:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:03,134 INFO L225 Difference]: With dead ends: 21936 [2022-11-18 18:50:03,135 INFO L226 Difference]: Without dead ends: 21888 [2022-11-18 18:50:03,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30772 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=16311, Invalid=56859, Unknown=0, NotChecked=0, Total=73170 [2022-11-18 18:50:03,141 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1442 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:03,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 0 Invalid, 5034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 4555 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-18 18:50:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21888 states. [2022-11-18 18:50:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21888 to 4123. [2022-11-18 18:50:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 3.6370693837942745) internal successors, (14992), 4122 states have internal predecessors, (14992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:03,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 14992 transitions. [2022-11-18 18:50:03,878 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 14992 transitions. Word has length 22 [2022-11-18 18:50:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:03,878 INFO L495 AbstractCegarLoop]: Abstraction has 4123 states and 14992 transitions. [2022-11-18 18:50:03,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 14992 transitions. [2022-11-18 18:50:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:50:03,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:03,900 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:03,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:04,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:50:04,107 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:50:04,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash 602785012, now seen corresponding path program 3 times [2022-11-18 18:50:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:04,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647302222] [2022-11-18 18:50:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:04,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647302222] [2022-11-18 18:50:04,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647302222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:04,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130860538] [2022-11-18 18:50:04,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:50:04,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:04,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:04,959 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:04,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:50:05,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 18:50:05,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 18:50:05,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:06,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:07,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130860538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:07,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:07,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:50:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492273511] [2022-11-18 18:50:07,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:07,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:50:07,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:50:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2056, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:50:07,240 INFO L87 Difference]: Start difference. First operand 4123 states and 14992 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:50:39,056 INFO L93 Difference]: Finished difference Result 26451 states and 84877 transitions. [2022-11-18 18:50:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-11-18 18:50:39,057 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:50:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:50:39,241 INFO L225 Difference]: With dead ends: 26451 [2022-11-18 18:50:39,241 INFO L226 Difference]: Without dead ends: 26433 [2022-11-18 18:50:39,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33570 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=18817, Invalid=64993, Unknown=0, NotChecked=0, Total=83810 [2022-11-18 18:50:39,247 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1876 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4220 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1876 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 4220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:50:39,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1876 Valid, 0 Invalid, 4765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 4220 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-18 18:50:39,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26433 states. [2022-11-18 18:50:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26433 to 4624. [2022-11-18 18:50:39,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4623 states have (on average 3.701708847069003) internal successors, (17113), 4623 states have internal predecessors, (17113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 17113 transitions. [2022-11-18 18:50:39,834 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 17113 transitions. Word has length 23 [2022-11-18 18:50:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:50:39,835 INFO L495 AbstractCegarLoop]: Abstraction has 4624 states and 17113 transitions. [2022-11-18 18:50:39,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:50:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 17113 transitions. [2022-11-18 18:50:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:50:39,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:50:39,855 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:50:39,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:50:40,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:50:40,062 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:50:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:50:40,063 INFO L85 PathProgramCache]: Analyzing trace with hash -32334450, now seen corresponding path program 4 times [2022-11-18 18:50:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:50:40,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828057365] [2022-11-18 18:50:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:50:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:50:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:50:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:50:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828057365] [2022-11-18 18:50:40,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828057365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:50:40,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960087271] [2022-11-18 18:50:40,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:50:40,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:50:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:50:40,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:50:40,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:50:41,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:50:41,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:50:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 18:50:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:50:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:41,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:50:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:50:43,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960087271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:50:43,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:50:43,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:50:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333752028] [2022-11-18 18:50:43,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:50:43,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:50:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:50:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:50:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:50:43,194 INFO L87 Difference]: Start difference. First operand 4624 states and 17113 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:51:17,899 INFO L93 Difference]: Finished difference Result 12820 states and 41066 transitions. [2022-11-18 18:51:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 287 states. [2022-11-18 18:51:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:51:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:51:17,934 INFO L225 Difference]: With dead ends: 12820 [2022-11-18 18:51:17,934 INFO L226 Difference]: Without dead ends: 12772 [2022-11-18 18:51:17,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45606 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=20514, Invalid=78396, Unknown=0, NotChecked=0, Total=98910 [2022-11-18 18:51:17,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5437 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 5437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:51:17,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1306 Valid, 0 Invalid, 6044 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [607 Valid, 5437 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-18 18:51:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12772 states. [2022-11-18 18:51:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12772 to 4953. [2022-11-18 18:51:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4953 states, 4952 states have (on average 3.740508885298869) internal successors, (18523), 4952 states have internal predecessors, (18523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4953 states to 4953 states and 18523 transitions. [2022-11-18 18:51:18,379 INFO L78 Accepts]: Start accepts. Automaton has 4953 states and 18523 transitions. Word has length 23 [2022-11-18 18:51:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:51:18,379 INFO L495 AbstractCegarLoop]: Abstraction has 4953 states and 18523 transitions. [2022-11-18 18:51:18,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:51:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4953 states and 18523 transitions. [2022-11-18 18:51:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:51:18,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:51:18,397 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:51:18,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 18:51:18,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:51:18,604 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:51:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:51:18,605 INFO L85 PathProgramCache]: Analyzing trace with hash -460431120, now seen corresponding path program 5 times [2022-11-18 18:51:18,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:51:18,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139691028] [2022-11-18 18:51:18,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:51:18,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:51:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:51:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:51:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139691028] [2022-11-18 18:51:19,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139691028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:51:19,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864583519] [2022-11-18 18:51:19,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:51:19,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:51:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:51:19,303 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:51:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:51:19,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 18:51:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:51:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:51:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:51:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:20,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:51:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:51:21,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864583519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:51:21,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:51:21,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:51:21,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908543678] [2022-11-18 18:51:21,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:51:21,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:51:21,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:51:21,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:51:21,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:51:21,201 INFO L87 Difference]: Start difference. First operand 4953 states and 18523 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:52:01,967 INFO L93 Difference]: Finished difference Result 17637 states and 56946 transitions. [2022-11-18 18:52:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 328 states. [2022-11-18 18:52:01,968 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:52:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:52:02,021 INFO L225 Difference]: With dead ends: 17637 [2022-11-18 18:52:02,021 INFO L226 Difference]: Without dead ends: 17541 [2022-11-18 18:52:02,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61086 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=27038, Invalid=98632, Unknown=0, NotChecked=0, Total=125670 [2022-11-18 18:52:02,027 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6140 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 6140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:52:02,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 0 Invalid, 6789 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [649 Valid, 6140 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-18 18:52:02,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17541 states. [2022-11-18 18:52:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17541 to 5933. [2022-11-18 18:52:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5933 states, 5932 states have (on average 3.816250842886042) internal successors, (22638), 5932 states have internal predecessors, (22638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5933 states to 5933 states and 22638 transitions. [2022-11-18 18:52:02,610 INFO L78 Accepts]: Start accepts. Automaton has 5933 states and 22638 transitions. Word has length 23 [2022-11-18 18:52:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:52:02,611 INFO L495 AbstractCegarLoop]: Abstraction has 5933 states and 22638 transitions. [2022-11-18 18:52:02,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:52:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5933 states and 22638 transitions. [2022-11-18 18:52:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:52:02,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:52:02,634 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:52:02,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:52:02,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:52:02,842 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:52:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:52:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash 441771378, now seen corresponding path program 6 times [2022-11-18 18:52:02,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:52:02,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533572180] [2022-11-18 18:52:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:52:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:52:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:52:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:52:03,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533572180] [2022-11-18 18:52:03,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533572180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:52:03,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282744052] [2022-11-18 18:52:03,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:52:03,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:52:03,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:52:03,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:52:03,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:52:03,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 18:52:03,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:52:03,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:52:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:52:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 31 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:04,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:52:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:52:05,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282744052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:52:05,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:52:05,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:52:05,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033448958] [2022-11-18 18:52:05,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:52:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:52:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:52:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:52:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2064, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:52:05,842 INFO L87 Difference]: Start difference. First operand 5933 states and 22638 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:00,560 INFO L93 Difference]: Finished difference Result 22090 states and 71229 transitions. [2022-11-18 18:53:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 358 states. [2022-11-18 18:53:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:53:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:00,624 INFO L225 Difference]: With dead ends: 22090 [2022-11-18 18:53:00,624 INFO L226 Difference]: Without dead ends: 21935 [2022-11-18 18:53:00,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71889 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=29306, Invalid=117766, Unknown=0, NotChecked=0, Total=147072 [2022-11-18 18:53:00,631 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1326 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7067 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 7067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:00,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 0 Invalid, 7793 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [726 Valid, 7067 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-18 18:53:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21935 states. [2022-11-18 18:53:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21935 to 6244. [2022-11-18 18:53:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6244 states, 6243 states have (on average 3.871856479256768) internal successors, (24172), 6243 states have internal predecessors, (24172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6244 states to 6244 states and 24172 transitions. [2022-11-18 18:53:01,236 INFO L78 Accepts]: Start accepts. Automaton has 6244 states and 24172 transitions. Word has length 23 [2022-11-18 18:53:01,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:01,237 INFO L495 AbstractCegarLoop]: Abstraction has 6244 states and 24172 transitions. [2022-11-18 18:53:01,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6244 states and 24172 transitions. [2022-11-18 18:53:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:53:01,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:01,262 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:01,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 18:53:01,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:53:01,469 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:53:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1352380110, now seen corresponding path program 7 times [2022-11-18 18:53:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:01,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522682386] [2022-11-18 18:53:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:02,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522682386] [2022-11-18 18:53:02,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522682386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:53:02,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85563584] [2022-11-18 18:53:02,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:53:02,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:02,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:53:02,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:53:02,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:53:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:53:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:53:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 27 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:03,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:53:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:04,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85563584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:53:04,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:53:04,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:53:04,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119132211] [2022-11-18 18:53:04,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:53:04,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:53:04,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:53:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:53:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:53:04,565 INFO L87 Difference]: Start difference. First operand 6244 states and 24172 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:53:57,764 INFO L93 Difference]: Finished difference Result 22912 states and 73779 transitions. [2022-11-18 18:53:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 360 states. [2022-11-18 18:53:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:53:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:53:57,831 INFO L225 Difference]: With dead ends: 22912 [2022-11-18 18:53:57,831 INFO L226 Difference]: Without dead ends: 22827 [2022-11-18 18:53:57,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71888 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=29287, Invalid=118553, Unknown=0, NotChecked=0, Total=147840 [2022-11-18 18:53:57,839 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1488 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6340 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 6340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:53:57,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1488 Valid, 0 Invalid, 7014 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [674 Valid, 6340 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-18 18:53:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22827 states. [2022-11-18 18:53:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22827 to 6449. [2022-11-18 18:53:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 6448 states have (on average 3.9154776674937963) internal successors, (25247), 6448 states have internal predecessors, (25247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:58,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 25247 transitions. [2022-11-18 18:53:58,443 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 25247 transitions. Word has length 23 [2022-11-18 18:53:58,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:53:58,444 INFO L495 AbstractCegarLoop]: Abstraction has 6449 states and 25247 transitions. [2022-11-18 18:53:58,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:53:58,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 25247 transitions. [2022-11-18 18:53:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:53:58,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:53:58,460 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:53:58,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:53:58,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:58,661 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:53:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:53:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash -483520270, now seen corresponding path program 8 times [2022-11-18 18:53:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:53:58,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178334837] [2022-11-18 18:53:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:53:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:53:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:53:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:53:59,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:53:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178334837] [2022-11-18 18:53:59,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178334837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:53:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305934993] [2022-11-18 18:53:59,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:53:59,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:53:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:53:59,511 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:53:59,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:53:59,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:53:59,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:53:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:53:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:54:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:00,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:54:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:54:01,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305934993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:54:01,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:54:01,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:54:01,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481828219] [2022-11-18 18:54:01,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:54:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:54:01,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:54:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:54:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2061, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:54:01,374 INFO L87 Difference]: Start difference. First operand 6449 states and 25247 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:54:58,284 INFO L93 Difference]: Finished difference Result 24653 states and 79489 transitions. [2022-11-18 18:54:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 379 states. [2022-11-18 18:54:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:54:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:54:58,364 INFO L225 Difference]: With dead ends: 24653 [2022-11-18 18:54:58,364 INFO L226 Difference]: Without dead ends: 24602 [2022-11-18 18:54:58,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78137 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=32047, Invalid=129959, Unknown=0, NotChecked=0, Total=162006 [2022-11-18 18:54:58,374 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1551 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6842 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 6842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-18 18:54:58,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 0 Invalid, 7533 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [691 Valid, 6842 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-18 18:54:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24602 states. [2022-11-18 18:54:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24602 to 6592. [2022-11-18 18:54:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6592 states, 6591 states have (on average 3.936428463055682) internal successors, (25945), 6591 states have internal predecessors, (25945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 25945 transitions. [2022-11-18 18:54:59,280 INFO L78 Accepts]: Start accepts. Automaton has 6592 states and 25945 transitions. Word has length 23 [2022-11-18 18:54:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:54:59,280 INFO L495 AbstractCegarLoop]: Abstraction has 6592 states and 25945 transitions. [2022-11-18 18:54:59,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:54:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6592 states and 25945 transitions. [2022-11-18 18:54:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:54:59,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:54:59,298 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:54:59,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:54:59,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:54:59,499 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:54:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:54:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1561857202, now seen corresponding path program 9 times [2022-11-18 18:54:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:54:59,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119968418] [2022-11-18 18:54:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:54:59,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:54:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:55:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:00,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:55:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119968418] [2022-11-18 18:55:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119968418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:55:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837930734] [2022-11-18 18:55:00,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:55:00,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:55:00,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:55:00,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:55:00,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:55:00,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 18:55:00,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:55:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:55:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:55:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:01,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:55:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:55:02,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837930734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:55:02,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:55:02,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:55:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974164291] [2022-11-18 18:55:02,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:55:02,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:55:02,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:55:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:55:02,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2056, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:55:02,383 INFO L87 Difference]: Start difference. First operand 6592 states and 25945 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:56:04,495 INFO L93 Difference]: Finished difference Result 26991 states and 87155 transitions. [2022-11-18 18:56:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 420 states. [2022-11-18 18:56:04,495 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:56:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:56:04,591 INFO L225 Difference]: With dead ends: 26991 [2022-11-18 18:56:04,591 INFO L226 Difference]: Without dead ends: 26903 [2022-11-18 18:56:04,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 439 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93336 ImplicationChecksByTransitivity, 53.7s TimeCoverageRelationStatistics Valid=38716, Invalid=155324, Unknown=0, NotChecked=0, Total=194040 [2022-11-18 18:56:04,602 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1710 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6807 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 6807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:56:04,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 0 Invalid, 7555 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [748 Valid, 6807 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-18 18:56:04,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26903 states. [2022-11-18 18:56:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26903 to 6637. [2022-11-18 18:56:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6637 states, 6636 states have (on average 3.939722724532851) internal successors, (26144), 6636 states have internal predecessors, (26144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6637 states to 6637 states and 26144 transitions. [2022-11-18 18:56:05,313 INFO L78 Accepts]: Start accepts. Automaton has 6637 states and 26144 transitions. Word has length 23 [2022-11-18 18:56:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:56:05,314 INFO L495 AbstractCegarLoop]: Abstraction has 6637 states and 26144 transitions. [2022-11-18 18:56:05,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:56:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 6637 states and 26144 transitions. [2022-11-18 18:56:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:56:05,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:56:05,332 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:56:05,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-18 18:56:05,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:56:05,532 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:56:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:56:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash -630563726, now seen corresponding path program 10 times [2022-11-18 18:56:05,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:56:05,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318902195] [2022-11-18 18:56:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:56:05,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:56:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:56:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:06,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:56:06,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318902195] [2022-11-18 18:56:06,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318902195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:56:06,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752568519] [2022-11-18 18:56:06,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:56:06,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:56:06,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:56:06,393 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:56:06,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:56:06,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:56:06,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:56:06,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-18 18:56:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:56:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 27 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:07,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:56:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:56:08,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752568519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:56:08,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:56:08,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:56:08,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435284447] [2022-11-18 18:56:08,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:56:08,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:56:08,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:56:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:56:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:56:08,324 INFO L87 Difference]: Start difference. First operand 6637 states and 26144 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:57:16,477 INFO L93 Difference]: Finished difference Result 30919 states and 99549 transitions. [2022-11-18 18:57:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 452 states. [2022-11-18 18:57:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:57:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:57:16,584 INFO L225 Difference]: With dead ends: 30919 [2022-11-18 18:57:16,584 INFO L226 Difference]: Without dead ends: 30711 [2022-11-18 18:57:16,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105464 ImplicationChecksByTransitivity, 59.4s TimeCoverageRelationStatistics Valid=43869, Invalid=176561, Unknown=0, NotChecked=0, Total=220430 [2022-11-18 18:57:16,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1772 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6347 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 6347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:57:16,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1772 Valid, 0 Invalid, 7072 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [725 Valid, 6347 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-18 18:57:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30711 states. [2022-11-18 18:57:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30711 to 6627. [2022-11-18 18:57:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 6626 states have (on average 3.941744642318141) internal successors, (26118), 6626 states have internal predecessors, (26118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:17,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 26118 transitions. [2022-11-18 18:57:17,515 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 26118 transitions. Word has length 23 [2022-11-18 18:57:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:57:17,515 INFO L495 AbstractCegarLoop]: Abstraction has 6627 states and 26118 transitions. [2022-11-18 18:57:17,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:57:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 26118 transitions. [2022-11-18 18:57:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:57:17,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:57:17,538 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:57:17,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:57:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:57:17,739 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:57:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:57:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1825237042, now seen corresponding path program 11 times [2022-11-18 18:57:17,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:57:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260198888] [2022-11-18 18:57:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:57:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:57:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:57:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:18,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:57:18,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260198888] [2022-11-18 18:57:18,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260198888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:57:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968555199] [2022-11-18 18:57:18,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:57:18,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:57:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:57:18,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:57:18,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:57:18,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 18:57:18,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:57:18,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:57:18,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:57:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 31 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:19,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:57:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:57:20,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968555199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:57:20,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:57:20,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:57:20,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811990179] [2022-11-18 18:57:20,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:57:20,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:57:20,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:57:20,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:57:20,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:57:20,555 INFO L87 Difference]: Start difference. First operand 6627 states and 26118 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:58:47,488 INFO L93 Difference]: Finished difference Result 36842 states and 119141 transitions. [2022-11-18 18:58:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 563 states. [2022-11-18 18:58:47,489 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 18:58:47,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:58:47,613 INFO L225 Difference]: With dead ends: 36842 [2022-11-18 18:58:47,613 INFO L226 Difference]: Without dead ends: 36586 [2022-11-18 18:58:47,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158597 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=62994, Invalid=264762, Unknown=0, NotChecked=0, Total=327756 [2022-11-18 18:58:47,629 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1704 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8753 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 8753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:58:47,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 0 Invalid, 9537 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [784 Valid, 8753 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-18 18:58:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36586 states. [2022-11-18 18:58:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36586 to 6641. [2022-11-18 18:58:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 3.9375) internal successors, (26145), 6640 states have internal predecessors, (26145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 26145 transitions. [2022-11-18 18:58:48,679 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 26145 transitions. Word has length 23 [2022-11-18 18:58:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:58:48,680 INFO L495 AbstractCegarLoop]: Abstraction has 6641 states and 26145 transitions. [2022-11-18 18:58:48,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:58:48,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 26145 transitions. [2022-11-18 18:58:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 18:58:48,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:58:48,696 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:58:48,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 18:58:48,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 18:58:48,897 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 18:58:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:58:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash -205404174, now seen corresponding path program 12 times [2022-11-18 18:58:48,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:58:48,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997444299] [2022-11-18 18:58:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:58:48,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:58:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:58:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:49,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:58:49,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997444299] [2022-11-18 18:58:49,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997444299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:58:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061639566] [2022-11-18 18:58:49,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:58:49,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:58:49,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:58:49,580 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:58:49,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 18:58:49,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 18:58:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:58:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 18:58:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:58:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:50,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:58:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:58:51,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061639566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:58:51,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:58:51,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 18:58:51,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629894976] [2022-11-18 18:58:51,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:58:51,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 18:58:51,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:58:51,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 18:58:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2029, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 18:58:51,600 INFO L87 Difference]: Start difference. First operand 6641 states and 26145 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:00:48,609 INFO L93 Difference]: Finished difference Result 42884 states and 139715 transitions. [2022-11-18 19:00:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 742 states. [2022-11-18 19:00:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 19:00:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:00:48,920 INFO L225 Difference]: With dead ends: 42884 [2022-11-18 19:00:48,920 INFO L226 Difference]: Without dead ends: 42783 [2022-11-18 19:00:48,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 754 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286586 ImplicationChecksByTransitivity, 102.0s TimeCoverageRelationStatistics Valid=110064, Invalid=460716, Unknown=0, NotChecked=0, Total=570780 [2022-11-18 19:00:48,949 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1917 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10362 mSolverCounterSat, 875 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 875 IncrementalHoareTripleChecker+Valid, 10362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:00:48,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 0 Invalid, 11237 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [875 Valid, 10362 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-18 19:00:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42783 states. [2022-11-18 19:00:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42783 to 6677. [2022-11-18 19:00:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6676 states have (on average 3.9357399640503297) internal successors, (26275), 6676 states have internal predecessors, (26275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 26275 transitions. [2022-11-18 19:00:49,954 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 26275 transitions. Word has length 23 [2022-11-18 19:00:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:00:49,954 INFO L495 AbstractCegarLoop]: Abstraction has 6677 states and 26275 transitions. [2022-11-18 19:00:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:00:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 26275 transitions. [2022-11-18 19:00:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 19:00:49,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:00:49,978 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:00:49,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 19:00:50,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 19:00:50,185 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 19:00:50,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:00:50,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1530192818, now seen corresponding path program 13 times [2022-11-18 19:00:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:00:50,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784018679] [2022-11-18 19:00:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:00:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:00:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:00:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:00:51,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784018679] [2022-11-18 19:00:51,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784018679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:00:51,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789152652] [2022-11-18 19:00:51,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:00:51,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:00:51,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:00:51,159 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:00:51,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1b34439-b11d-462b-82f2-12636f3c8150/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 19:00:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:00:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-18 19:00:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:00:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:52,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:00:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:00:53,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789152652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:00:53,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:00:53,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 19:00:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672727715] [2022-11-18 19:00:53,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:00:53,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 19:00:53,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:00:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 19:00:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2026, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 19:00:53,347 INFO L87 Difference]: Start difference. First operand 6677 states and 26275 transitions. Second operand has 50 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)