./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-7.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_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/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_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/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_ec209915-dd7f-48bd-b9e2-010220906c40/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 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 --- 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 18:34:27,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:34:27,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:34:27,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:34:27,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:34:27,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:34:27,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:34:27,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:34:27,664 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:34:27,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:34:27,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:34:27,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:34:27,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:34:27,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:34:27,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:34:27,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:34:27,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:34:27,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:34:27,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:34:27,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:34:27,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:34:27,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:34:27,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:34:27,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:34:27,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:34:27,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:34:27,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:34:27,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:34:27,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:34:27,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:34:27,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:34:27,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:34:27,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:34:27,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:34:27,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:34:27,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:34:27,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:34:27,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:34:27,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:34:27,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:34:27,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:34:27,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 18:34:27,762 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:34:27,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:34:27,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:34:27,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:34:27,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:34:27,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:34:27,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:34:27,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:34:27,768 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:34:27,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:34:27,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:34:27,770 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 18:34:27,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:34:27,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:34:27,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:34:27,771 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 18:34:27,771 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 18:34:27,772 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 18:34:27,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:34:27,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 18:34:27,772 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:34:27,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:34:27,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:34:27,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:34:27,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:34:27,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:34:27,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:34:27,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:34:27,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:34:27,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:34:27,776 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_ec209915-dd7f-48bd-b9e2-010220906c40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 [2022-11-18 18:34:28,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:34:28,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:34:28,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:34:28,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:34:28,109 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:34:28,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/fib_safe-7.i [2022-11-18 18:34:28,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/data/cfade4e15/745d75c1bcbf4e29b792f6644140b1df/FLAG2cc337a8e [2022-11-18 18:34:28,778 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:34:28,778 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/sv-benchmarks/c/pthread/fib_safe-7.i [2022-11-18 18:34:28,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/data/cfade4e15/745d75c1bcbf4e29b792f6644140b1df/FLAG2cc337a8e [2022-11-18 18:34:29,087 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/data/cfade4e15/745d75c1bcbf4e29b792f6644140b1df [2022-11-18 18:34:29,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:34:29,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:34:29,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:34:29,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:34:29,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:34:29,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d06ed03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29, skipping insertion in model container [2022-11-18 18:34:29,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:34:29,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:34:29,606 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_ec209915-dd7f-48bd-b9e2-010220906c40/sv-benchmarks/c/pthread/fib_safe-7.i[30241,30254] [2022-11-18 18:34:29,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:34:29,651 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:34:29,715 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_ec209915-dd7f-48bd-b9e2-010220906c40/sv-benchmarks/c/pthread/fib_safe-7.i[30241,30254] [2022-11-18 18:34:29,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:34:29,773 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:34:29,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29 WrapperNode [2022-11-18 18:34:29,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:34:29,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:34:29,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:34:29,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:34:29,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,842 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-18 18:34:29,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:34:29,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:34:29,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:34:29,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:34:29,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,865 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:34:29,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:34:29,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:34:29,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:34:29,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (1/1) ... [2022-11-18 18:34:29,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:34:29,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:29,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:34:29,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:34:29,975 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:34:29,975 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:34:29,975 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:34:29,975 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:34:29,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:34:29,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 18:34:29,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:34:29,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:34:29,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:34:29,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:34:29,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 18:34:29,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:34:29,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:34:29,979 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 18:34:30,115 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:34:30,117 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:34:30,357 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:34:30,384 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:34:30,384 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 18:34:30,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:34:30 BoogieIcfgContainer [2022-11-18 18:34:30,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:34:30,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:34:30,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:34:30,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:34:30,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:34:29" (1/3) ... [2022-11-18 18:34:30,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd35692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:34:30, skipping insertion in model container [2022-11-18 18:34:30,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:34:29" (2/3) ... [2022-11-18 18:34:30,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd35692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:34:30, skipping insertion in model container [2022-11-18 18:34:30,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:34:30" (3/3) ... [2022-11-18 18:34:30,418 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2022-11-18 18:34:30,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:34:30,439 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-18 18:34:30,440 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:34:30,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 18:34:30,576 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 18:34:30,600 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-18 18:34:30,607 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-18 18:34:30,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-18 18:34:30,673 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-18 18:34:30,673 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:34:30,680 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 18:34:30,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-18 18:34:35,306 INFO L134 LiptonReduction]: Checked pairs total: 1734 [2022-11-18 18:34:35,307 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-18 18:34:35,316 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-18 18:34:35,333 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 18:34:35,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:34:35,358 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;@f093678, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:34:35,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 18:34:35,360 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 18:34:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-18 18:34:35,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:35,366 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-18 18:34:35,367 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 18:34:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash 416, now seen corresponding path program 1 times [2022-11-18 18:34:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596957355] [2022-11-18 18:34:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:35,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:35,531 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 18:34:35,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:35,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596957355] [2022-11-18 18:34:35,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596957355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:35,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:35,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-18 18:34:35,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88939953] [2022-11-18 18:34:35,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:35,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:34:35,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:34:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:34:35,576 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 18:34:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:35,662 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-18 18:34:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:34:35,666 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 18:34:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:35,679 INFO L225 Difference]: With dead ends: 50 [2022-11-18 18:34:35,680 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 18:34:35,681 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 18:34:35,686 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:35,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:34:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 18:34:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 18:34:35,733 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 18:34:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-18 18:34:35,740 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-18 18:34:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:35,740 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-18 18:34:35,745 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 18:34:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-18 18:34:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:34:35,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:35,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:34:35,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:34:35,748 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 18:34:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash 410520, now seen corresponding path program 1 times [2022-11-18 18:34:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:35,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355790651] [2022-11-18 18:34:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:36,070 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 18:34:36,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:36,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355790651] [2022-11-18 18:34:36,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355790651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:36,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:36,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:34:36,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415019931] [2022-11-18 18:34:36,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:36,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:36,075 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 18:34:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:36,122 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-18 18:34:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:36,124 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 18:34:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:36,125 INFO L225 Difference]: With dead ends: 47 [2022-11-18 18:34:36,125 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 18:34:36,126 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 18:34:36,127 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 18:34:36,128 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 18:34:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 18:34:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-18 18:34:36,142 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 18:34:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-18 18:34:36,147 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-18 18:34:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:36,148 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-18 18:34:36,148 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 18:34:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-18 18:34:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 18:34:36,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:36,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 18:34:36,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:34:36,150 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 18:34:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash 410521, now seen corresponding path program 1 times [2022-11-18 18:34:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:36,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446605163] [2022-11-18 18:34:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:36,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:36,259 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 18:34:36,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:36,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446605163] [2022-11-18 18:34:36,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446605163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:36,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:36,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:34:36,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344208843] [2022-11-18 18:34:36,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:36,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:36,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:36,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:36,264 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 18:34:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:36,310 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-18 18:34:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:36,311 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 18:34:36,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:36,315 INFO L225 Difference]: With dead ends: 44 [2022-11-18 18:34:36,316 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 18:34:36,317 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 18:34:36,321 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 18:34:36,322 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 18:34:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 18:34:36,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-18 18:34:36,338 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 18:34:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-18 18:34:36,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-18 18:34:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:36,341 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-18 18:34:36,342 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 18:34:36,342 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-18 18:34:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 18:34:36,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:36,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 18:34:36,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:34:36,344 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 18:34:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash -654854385, now seen corresponding path program 1 times [2022-11-18 18:34:36,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:36,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179618620] [2022-11-18 18:34:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:36,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:36,438 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 18:34:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179618620] [2022-11-18 18:34:36,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179618620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:36,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:36,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:34:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741327136] [2022-11-18 18:34:36,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:34:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:34:36,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:34:36,448 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 18:34:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:36,493 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-18 18:34:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:34:36,494 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 18:34:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:36,495 INFO L225 Difference]: With dead ends: 53 [2022-11-18 18:34:36,496 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 18:34:36,496 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 18:34:36,499 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 18:34:36,501 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 18:34:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 18:34:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 18:34:36,514 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 18:34:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-18 18:34:36,518 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-18 18:34:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:36,519 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-18 18:34:36,519 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 18:34:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-18 18:34:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 18:34:36,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:36,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:36,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:34:36,522 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 18:34:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1174350712, now seen corresponding path program 1 times [2022-11-18 18:34:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:36,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306374281] [2022-11-18 18:34:36,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:36,601 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 18:34:36,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:36,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306374281] [2022-11-18 18:34:36,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306374281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:36,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193798338] [2022-11-18 18:34:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:36,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:36,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:36,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:36,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:34:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 18:34:36,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:36,789 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 18:34:36,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:36,823 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 18:34:36,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193798338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:36,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:36,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 18:34:36,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800230195] [2022-11-18 18:34:36,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:36,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:34:36,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:34:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:34:36,826 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 18:34:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:36,966 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-18 18:34:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:34:36,969 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 18:34:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:36,970 INFO L225 Difference]: With dead ends: 80 [2022-11-18 18:34:36,970 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 18:34:36,970 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 18:34:36,971 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 18:34:36,972 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 18:34:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 18:34:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-18 18:34:36,999 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 18:34:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-18 18:34:37,000 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-18 18:34:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:37,000 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-18 18:34:37,001 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 18:34:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-18 18:34:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 18:34:37,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:37,002 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:37,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:37,203 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 18:34:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1721366193, now seen corresponding path program 2 times [2022-11-18 18:34:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:37,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627556721] [2022-11-18 18:34:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:37,337 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 18:34:37,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:37,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627556721] [2022-11-18 18:34:37,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627556721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403279067] [2022-11-18 18:34:37,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:34:37,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:37,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:37,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:37,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:34:37,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:34:37,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 18:34:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:37,491 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 18:34:37,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:37,558 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 18:34:37,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403279067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:37,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:37,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 18:34:37,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108366766] [2022-11-18 18:34:37,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:37,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 18:34:37,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 18:34:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:34:37,561 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 18:34:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:37,737 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-18 18:34:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:34:37,738 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 18:34:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:37,739 INFO L225 Difference]: With dead ends: 134 [2022-11-18 18:34:37,740 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 18:34:37,740 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 18:34:37,741 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:37,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 18:34:37,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 18:34:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-18 18:34:37,758 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 18:34:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-18 18:34:37,763 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-18 18:34:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:37,764 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-18 18:34:37,764 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 18:34:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-18 18:34:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 18:34:37,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:37,767 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:37,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:37,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:37,968 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 18:34:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:37,969 INFO L85 PathProgramCache]: Analyzing trace with hash 109095087, now seen corresponding path program 3 times [2022-11-18 18:34:37,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:37,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093464111] [2022-11-18 18:34:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:37,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:38,286 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 18:34:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093464111] [2022-11-18 18:34:38,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093464111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627612810] [2022-11-18 18:34:38,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:34:38,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:38,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:38,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:38,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:34:38,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 18:34:38,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:34:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:38,475 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 18:34:38,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:38,661 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 18:34:38,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627612810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:38,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:38,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-11-18 18:34:38,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097998050] [2022-11-18 18:34:38,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:38,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:34:38,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:34:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:34:38,664 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:38,937 INFO L93 Difference]: Finished difference Result 188 states and 554 transitions. [2022-11-18 18:34:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 18:34:38,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 18:34:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:38,940 INFO L225 Difference]: With dead ends: 188 [2022-11-18 18:34:38,940 INFO L226 Difference]: Without dead ends: 188 [2022-11-18 18:34:38,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-11-18 18:34:38,941 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 192 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:38,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 0 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 18:34:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-18 18:34:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-18 18:34:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 2.978494623655914) internal successors, (554), 187 states have internal predecessors, (554), 0 states have call successors, (0), 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 18:34:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 554 transitions. [2022-11-18 18:34:38,955 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 554 transitions. Word has length 16 [2022-11-18 18:34:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:38,955 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 554 transitions. [2022-11-18 18:34:38,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 554 transitions. [2022-11-18 18:34:38,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 18:34:38,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:38,958 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:38,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:39,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 18:34:39,164 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 18:34:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:39,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1925300209, now seen corresponding path program 4 times [2022-11-18 18:34:39,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:39,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634658753] [2022-11-18 18:34:39,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:39,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634658753] [2022-11-18 18:34:40,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634658753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:34:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210667035] [2022-11-18 18:34:40,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:34:40,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:40,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:40,467 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:40,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:34:40,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:34:40,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:34:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:34:40,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:41,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:34:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:43,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210667035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:43,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:43,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-18 18:34:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992682657] [2022-11-18 18:34:43,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 18:34:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 18:34:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2239, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 18:34:43,067 INFO L87 Difference]: Start difference. First operand 188 states and 554 transitions. Second operand has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 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 18:35:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:14,135 INFO L93 Difference]: Finished difference Result 15867 states and 47087 transitions. [2022-11-18 18:35:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 272 states. [2022-11-18 18:35:14,136 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 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 18:35:14,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:14,310 INFO L225 Difference]: With dead ends: 15867 [2022-11-18 18:35:14,311 INFO L226 Difference]: Without dead ends: 15867 [2022-11-18 18:35:14,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42000 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=18692, Invalid=73420, Unknown=0, NotChecked=0, Total=92112 [2022-11-18 18:35:14,327 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3605 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3031 mSolverCounterSat, 852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3605 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 852 IncrementalHoareTripleChecker+Valid, 3031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:14,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3605 Valid, 0 Invalid, 3883 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [852 Valid, 3031 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-18 18:35:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15867 states. [2022-11-18 18:35:14,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15867 to 12209. [2022-11-18 18:35:14,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12207 states have (on average 3.2844269681330385) internal successors, (40093), 12208 states have internal predecessors, (40093), 0 states have call successors, (0), 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 18:35:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 40093 transitions. [2022-11-18 18:35:15,019 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 40093 transitions. Word has length 22 [2022-11-18 18:35:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:15,022 INFO L495 AbstractCegarLoop]: Abstraction has 12209 states and 40093 transitions. [2022-11-18 18:35:15,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 52 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 18:35:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 40093 transitions. [2022-11-18 18:35:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 18:35:15,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:15,057 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:15,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 18:35:15,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:15,262 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 18:35:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1925300204, now seen corresponding path program 1 times [2022-11-18 18:35:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:15,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41752786] [2022-11-18 18:35:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-18 18:35:15,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:15,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41752786] [2022-11-18 18:35:15,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41752786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:15,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:35:15,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 18:35:15,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716635833] [2022-11-18 18:35:15,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:15,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:35:15,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:35:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:35:15,610 INFO L87 Difference]: Start difference. First operand 12209 states and 40093 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 18:35:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:15,719 INFO L93 Difference]: Finished difference Result 12200 states and 38898 transitions. [2022-11-18 18:35:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:35:15,720 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 22 [2022-11-18 18:35:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:15,793 INFO L225 Difference]: With dead ends: 12200 [2022-11-18 18:35:15,793 INFO L226 Difference]: Without dead ends: 12182 [2022-11-18 18:35:15,794 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 18:35:15,796 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 18:35:15,796 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 18:35:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12182 states. [2022-11-18 18:35:16,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12182 to 12030. [2022-11-18 18:35:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12030 states, 12029 states have (on average 3.216559980048217) internal successors, (38692), 12029 states have internal predecessors, (38692), 0 states have call successors, (0), 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 18:35:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12030 states to 12030 states and 38692 transitions. [2022-11-18 18:35:16,360 INFO L78 Accepts]: Start accepts. Automaton has 12030 states and 38692 transitions. Word has length 22 [2022-11-18 18:35:16,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:16,361 INFO L495 AbstractCegarLoop]: Abstraction has 12030 states and 38692 transitions. [2022-11-18 18:35:16,361 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 18:35:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 12030 states and 38692 transitions. [2022-11-18 18:35:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:35:16,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:16,492 INFO L195 NwaCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:16,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 18:35:16,492 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 18:35:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash 57723126, now seen corresponding path program 1 times [2022-11-18 18:35:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:16,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380158518] [2022-11-18 18:35:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:16,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 137 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:16,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:16,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380158518] [2022-11-18 18:35:16,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380158518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312517457] [2022-11-18 18:35:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:16,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:16,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:16,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:35:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 18:35:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:17,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:35:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312517457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:17,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 18:35:17,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [19] total 20 [2022-11-18 18:35:17,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361598632] [2022-11-18 18:35:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 18:35:17,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 18:35:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:35:17,094 INFO L87 Difference]: Start difference. First operand 12030 states and 38692 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:17,510 INFO L93 Difference]: Finished difference Result 12182 states and 37668 transitions. [2022-11-18 18:35:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 18:35:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 18:35:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:17,573 INFO L225 Difference]: With dead ends: 12182 [2022-11-18 18:35:17,574 INFO L226 Difference]: Without dead ends: 12028 [2022-11-18 18:35:17,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-11-18 18:35:17,575 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:17,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 18:35:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12028 states. [2022-11-18 18:35:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12028 to 924. [2022-11-18 18:35:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 2.932827735644637) internal successors, (2707), 923 states have internal predecessors, (2707), 0 states have call successors, (0), 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 18:35:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 2707 transitions. [2022-11-18 18:35:17,724 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 2707 transitions. Word has length 25 [2022-11-18 18:35:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:17,724 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 2707 transitions. [2022-11-18 18:35:17,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 2707 transitions. [2022-11-18 18:35:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:35:17,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:17,770 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:17,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 18:35:17,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 18:35:17,971 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 18:35:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash 57722661, now seen corresponding path program 2 times [2022-11-18 18:35:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:17,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751874088] [2022-11-18 18:35:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751874088] [2022-11-18 18:35:19,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751874088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:35:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618092628] [2022-11-18 18:35:19,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:35:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:19,052 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:35:19,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:35:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:35:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 18:35:19,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:20,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:35:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:21,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618092628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:35:21,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:35:21,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-11-18 18:35:21,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251424011] [2022-11-18 18:35:21,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:35:21,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-18 18:35:21,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:21,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-18 18:35:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=2855, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 18:35:21,695 INFO L87 Difference]: Start difference. First operand 924 states and 2707 transitions. Second operand has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 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 18:36:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:09,797 INFO L93 Difference]: Finished difference Result 17190 states and 50109 transitions. [2022-11-18 18:36:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-11-18 18:36:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 18:36:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:09,872 INFO L225 Difference]: With dead ends: 17190 [2022-11-18 18:36:09,872 INFO L226 Difference]: Without dead ends: 17078 [2022-11-18 18:36:09,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57296 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=35404, Invalid=94556, Unknown=0, NotChecked=0, Total=129960 [2022-11-18 18:36:09,887 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3399 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:09,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 0 Invalid, 5805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [956 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-18 18:36:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17078 states. [2022-11-18 18:36:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17078 to 1659. [2022-11-18 18:36:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 3.1827503015681544) internal successors, (5277), 1658 states have internal predecessors, (5277), 0 states have call successors, (0), 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 18:36:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 5277 transitions. [2022-11-18 18:36:10,092 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 5277 transitions. Word has length 25 [2022-11-18 18:36:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:10,094 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 5277 transitions. [2022-11-18 18:36:10,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 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 18:36:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 5277 transitions. [2022-11-18 18:36:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 18:36:10,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:10,101 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:10,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:10,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:36:10,307 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 18:36:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:10,308 INFO L85 PathProgramCache]: Analyzing trace with hash -841752395, now seen corresponding path program 1 times [2022-11-18 18:36:10,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:10,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006117530] [2022-11-18 18:36:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:10,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:11,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006117530] [2022-11-18 18:36:11,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006117530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:36:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009051984] [2022-11-18 18:36:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:11,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:11,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:11,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:36:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 18:36:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:12,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:36:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:13,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009051984] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:36:13,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:36:13,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-11-18 18:36:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93545499] [2022-11-18 18:36:13,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:36:13,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-18 18:36:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-18 18:36:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=2855, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 18:36:13,871 INFO L87 Difference]: Start difference. First operand 1659 states and 5277 transitions. Second operand has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 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 18:37:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:37:01,552 INFO L93 Difference]: Finished difference Result 19089 states and 56439 transitions. [2022-11-18 18:37:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-11-18 18:37:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-18 18:37:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:37:01,611 INFO L225 Difference]: With dead ends: 19089 [2022-11-18 18:37:01,612 INFO L226 Difference]: Without dead ends: 18978 [2022-11-18 18:37:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57270 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=35404, Invalid=94556, Unknown=0, NotChecked=0, Total=129960 [2022-11-18 18:37:01,620 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4822 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3302 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 4822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:37:01,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3302 Valid, 0 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 4822 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 18:37:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18978 states. [2022-11-18 18:37:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18978 to 2317. [2022-11-18 18:37:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.309153713298791) internal successors, (7664), 2316 states have internal predecessors, (7664), 0 states have call successors, (0), 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 18:37:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7664 transitions. [2022-11-18 18:37:01,866 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7664 transitions. Word has length 25 [2022-11-18 18:37:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:37:01,866 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 7664 transitions. [2022-11-18 18:37:01,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.293103448275862) internal successors, (75), 58 states have internal predecessors, (75), 0 states have call successors, (0), 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 18:37:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7664 transitions. [2022-11-18 18:37:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:37:01,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:37:01,875 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:01,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:37:02,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:02,081 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 18:37:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1290272374, now seen corresponding path program 1 times [2022-11-18 18:37:02,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:02,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923549174] [2022-11-18 18:37:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:02,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:02,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923549174] [2022-11-18 18:37:02,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923549174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:02,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812501459] [2022-11-18 18:37:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:02,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:02,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:02,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:03,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:37:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 18:37:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:04,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:37:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:05,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812501459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:37:05,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:37:05,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-11-18 18:37:05,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989447175] [2022-11-18 18:37:05,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:37:05,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-18 18:37:05,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:05,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-18 18:37:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2853, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 18:37:05,217 INFO L87 Difference]: Start difference. First operand 2317 states and 7664 transitions. Second operand has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 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 18:37:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:37:56,229 INFO L93 Difference]: Finished difference Result 42266 states and 133642 transitions. [2022-11-18 18:37:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2022-11-18 18:37:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 18:37:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:37:56,343 INFO L225 Difference]: With dead ends: 42266 [2022-11-18 18:37:56,344 INFO L226 Difference]: Without dead ends: 42202 [2022-11-18 18:37:56,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86041 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=41331, Invalid=149201, Unknown=0, NotChecked=0, Total=190532 [2022-11-18 18:37:56,352 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2739 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7516 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2739 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 7516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:37:56,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2739 Valid, 0 Invalid, 8382 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [866 Valid, 7516 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-18 18:37:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42202 states. [2022-11-18 18:37:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42202 to 5187. [2022-11-18 18:37:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.557269571924412) internal successors, (18448), 5186 states have internal predecessors, (18448), 0 states have call successors, (0), 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 18:37:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 18448 transitions. [2022-11-18 18:37:57,262 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 18448 transitions. Word has length 26 [2022-11-18 18:37:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:37:57,262 INFO L495 AbstractCegarLoop]: Abstraction has 5187 states and 18448 transitions. [2022-11-18 18:37:57,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 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 18:37:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 18448 transitions. [2022-11-18 18:37:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 18:37:57,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:37:57,281 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:57,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:37:57,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 18:37:57,489 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 18:37:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1699097560, now seen corresponding path program 2 times [2022-11-18 18:37:57,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:57,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250637465] [2022-11-18 18:37:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:58,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250637465] [2022-11-18 18:37:58,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250637465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:37:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353422136] [2022-11-18 18:37:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:37:58,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:58,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:58,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:37:58,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:37:58,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:37:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-18 18:37:58,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:59,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:00,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353422136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:00,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:00,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-11-18 18:38:00,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012041311] [2022-11-18 18:38:00,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:00,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-18 18:38:00,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-18 18:38:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=2853, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 18:38:00,638 INFO L87 Difference]: Start difference. First operand 5187 states and 18448 transitions. Second operand has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 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 18:38:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:51,653 INFO L93 Difference]: Finished difference Result 55058 states and 177659 transitions. [2022-11-18 18:38:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2022-11-18 18:38:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 18:38:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:51,812 INFO L225 Difference]: With dead ends: 55058 [2022-11-18 18:38:51,812 INFO L226 Difference]: Without dead ends: 54994 [2022-11-18 18:38:51,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85402 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=41331, Invalid=149201, Unknown=0, NotChecked=0, Total=190532 [2022-11-18 18:38:51,820 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2614 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7382 mSolverCounterSat, 874 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2614 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 874 IncrementalHoareTripleChecker+Valid, 7382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:51,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2614 Valid, 0 Invalid, 8256 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [874 Valid, 7382 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-18 18:38:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54994 states. [2022-11-18 18:38:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54994 to 8747. [2022-11-18 18:38:52,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8747 states, 8746 states have (on average 3.713697690372742) internal successors, (32480), 8746 states have internal predecessors, (32480), 0 states have call successors, (0), 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 18:38:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8747 states to 8747 states and 32480 transitions. [2022-11-18 18:38:52,677 INFO L78 Accepts]: Start accepts. Automaton has 8747 states and 32480 transitions. Word has length 26 [2022-11-18 18:38:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:52,677 INFO L495 AbstractCegarLoop]: Abstraction has 8747 states and 32480 transitions. [2022-11-18 18:38:52,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 0 states have call successors, (0), 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 18:38:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8747 states and 32480 transitions. [2022-11-18 18:38:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:38:52,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:52,702 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:52,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:52,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:52,908 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 18:38:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:52,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1426879412, now seen corresponding path program 3 times [2022-11-18 18:38:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:52,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215641001] [2022-11-18 18:38:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:54,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215641001] [2022-11-18 18:38:54,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215641001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:38:54,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611631857] [2022-11-18 18:38:54,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:38:54,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:54,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:54,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:38:54,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 18:38:54,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:38:54,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 18:38:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 105 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:55,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:38:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:56,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611631857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:38:56,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:38:56,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:38:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909071229] [2022-11-18 18:38:56,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:38:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:38:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:38:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:38:56,636 INFO L87 Difference]: Start difference. First operand 8747 states and 32480 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:54,192 INFO L93 Difference]: Finished difference Result 66213 states and 218671 transitions. [2022-11-18 18:39:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 432 states. [2022-11-18 18:39:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:39:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:54,424 INFO L225 Difference]: With dead ends: 66213 [2022-11-18 18:39:54,425 INFO L226 Difference]: Without dead ends: 66191 [2022-11-18 18:39:54,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96429 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=48394, Invalid=172036, Unknown=0, NotChecked=0, Total=220430 [2022-11-18 18:39:54,439 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3454 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6093 mSolverCounterSat, 969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 969 IncrementalHoareTripleChecker+Valid, 6093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:54,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3454 Valid, 0 Invalid, 7062 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [969 Valid, 6093 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-18 18:39:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66191 states. [2022-11-18 18:39:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66191 to 10291. [2022-11-18 18:39:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10291 states, 10290 states have (on average 3.797181729834791) internal successors, (39073), 10290 states have internal predecessors, (39073), 0 states have call successors, (0), 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 18:39:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10291 states to 10291 states and 39073 transitions. [2022-11-18 18:39:55,839 INFO L78 Accepts]: Start accepts. Automaton has 10291 states and 39073 transitions. Word has length 27 [2022-11-18 18:39:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:55,839 INFO L495 AbstractCegarLoop]: Abstraction has 10291 states and 39073 transitions. [2022-11-18 18:39:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10291 states and 39073 transitions. [2022-11-18 18:39:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:39:55,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:55,870 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:55,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:56,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:39:56,075 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 18:39:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1357590578, now seen corresponding path program 4 times [2022-11-18 18:39:56,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:56,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54571645] [2022-11-18 18:39:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:56,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:56,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:56,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54571645] [2022-11-18 18:39:56,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54571645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:39:56,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108105639] [2022-11-18 18:39:56,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 18:39:56,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:56,924 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:56,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:39:57,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 18:39:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:39:57,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 18:39:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 91 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:57,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:39:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:59,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108105639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:39:59,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:39:59,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:39:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736488586] [2022-11-18 18:39:59,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:39:59,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:39:59,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:39:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=3153, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:39:59,181 INFO L87 Difference]: Start difference. First operand 10291 states and 39073 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:41:00,798 INFO L93 Difference]: Finished difference Result 27476 states and 90924 transitions. [2022-11-18 18:41:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-18 18:41:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:41:00,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:41:00,887 INFO L225 Difference]: With dead ends: 27476 [2022-11-18 18:41:00,888 INFO L226 Difference]: Without dead ends: 27422 [2022-11-18 18:41:00,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112839 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=45013, Invalid=191669, Unknown=0, NotChecked=0, Total=236682 [2022-11-18 18:41:00,905 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2424 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7890 mSolverCounterSat, 1031 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2424 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1031 IncrementalHoareTripleChecker+Valid, 7890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:41:00,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2424 Valid, 0 Invalid, 8921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1031 Valid, 7890 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-18 18:41:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27422 states. [2022-11-18 18:41:01,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27422 to 11168. [2022-11-18 18:41:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11168 states, 11167 states have (on average 3.848034387033223) internal successors, (42971), 11167 states have internal predecessors, (42971), 0 states have call successors, (0), 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 18:41:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11168 states to 11168 states and 42971 transitions. [2022-11-18 18:41:01,675 INFO L78 Accepts]: Start accepts. Automaton has 11168 states and 42971 transitions. Word has length 27 [2022-11-18 18:41:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:41:01,675 INFO L495 AbstractCegarLoop]: Abstraction has 11168 states and 42971 transitions. [2022-11-18 18:41:01,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11168 states and 42971 transitions. [2022-11-18 18:41:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:41:01,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:41:01,709 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:41:01,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 18:41:01,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:41:01,911 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 18:41:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1785687248, now seen corresponding path program 5 times [2022-11-18 18:41:01,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:01,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302349969] [2022-11-18 18:41:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:41:02,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:41:02,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302349969] [2022-11-18 18:41:02,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302349969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:41:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338042430] [2022-11-18 18:41:02,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 18:41:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:02,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:02,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:41:02,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 18:41:02,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:41:02,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:41:02,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:41:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 79 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:41:03,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:41:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:41:05,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338042430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:41:05,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:41:05,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:41:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142649035] [2022-11-18 18:41:05,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:41:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:41:05,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:41:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:41:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=3155, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:41:05,120 INFO L87 Difference]: Start difference. First operand 11168 states and 42971 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:20,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:42:20,054 INFO L93 Difference]: Finished difference Result 43658 states and 145709 transitions. [2022-11-18 18:42:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2022-11-18 18:42:20,055 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:42:20,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:42:20,181 INFO L225 Difference]: With dead ends: 43658 [2022-11-18 18:42:20,181 INFO L226 Difference]: Without dead ends: 43529 [2022-11-18 18:42:20,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160393 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=62301, Invalid=255231, Unknown=0, NotChecked=0, Total=317532 [2022-11-18 18:42:20,196 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2327 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9556 mSolverCounterSat, 1167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2327 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1167 IncrementalHoareTripleChecker+Valid, 9556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:42:20,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2327 Valid, 0 Invalid, 10723 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1167 Valid, 9556 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-18 18:42:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43529 states. [2022-11-18 18:42:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43529 to 14054. [2022-11-18 18:42:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14054 states, 14053 states have (on average 3.9413648331317157) internal successors, (55388), 14053 states have internal predecessors, (55388), 0 states have call successors, (0), 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 18:42:21,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14054 states to 14054 states and 55388 transitions. [2022-11-18 18:42:21,474 INFO L78 Accepts]: Start accepts. Automaton has 14054 states and 55388 transitions. Word has length 27 [2022-11-18 18:42:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:42:21,475 INFO L495 AbstractCegarLoop]: Abstraction has 14054 states and 55388 transitions. [2022-11-18 18:42:21,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 14054 states and 55388 transitions. [2022-11-18 18:42:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:42:21,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:42:21,507 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:42:21,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 18:42:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:42:21,709 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 18:42:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:42:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash -883484750, now seen corresponding path program 6 times [2022-11-18 18:42:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:42:21,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055770289] [2022-11-18 18:42:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:42:21,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:42:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:42:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:22,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055770289] [2022-11-18 18:42:22,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055770289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:42:22,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733249198] [2022-11-18 18:42:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 18:42:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:42:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:42:22,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:42:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:42:22,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 18:42:22,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:42:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 18:42:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 69 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:42:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:24,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733249198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:42:24,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:42:24,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:42:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238894050] [2022-11-18 18:42:24,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:42:24,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:42:24,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:42:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=3186, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:42:24,958 INFO L87 Difference]: Start difference. First operand 14054 states and 55388 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:44:08,383 INFO L93 Difference]: Finished difference Result 59074 states and 199229 transitions. [2022-11-18 18:44:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2022-11-18 18:44:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:44:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:44:08,587 INFO L225 Difference]: With dead ends: 59074 [2022-11-18 18:44:08,587 INFO L226 Difference]: Without dead ends: 58753 [2022-11-18 18:44:08,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 606 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186231 ImplicationChecksByTransitivity, 89.8s TimeCoverageRelationStatistics Valid=70790, Invalid=298266, Unknown=0, NotChecked=0, Total=369056 [2022-11-18 18:44:08,601 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2099 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10677 mSolverCounterSat, 1175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2099 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1175 IncrementalHoareTripleChecker+Valid, 10677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:44:08,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2099 Valid, 0 Invalid, 11852 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1175 Valid, 10677 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-18 18:44:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58753 states. [2022-11-18 18:44:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58753 to 16661. [2022-11-18 18:44:10,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16661 states, 16660 states have (on average 4.029711884753902) internal successors, (67135), 16660 states have internal predecessors, (67135), 0 states have call successors, (0), 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 18:44:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16661 states to 16661 states and 67135 transitions. [2022-11-18 18:44:10,930 INFO L78 Accepts]: Start accepts. Automaton has 16661 states and 67135 transitions. Word has length 27 [2022-11-18 18:44:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:44:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 16661 states and 67135 transitions. [2022-11-18 18:44:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:44:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 16661 states and 67135 transitions. [2022-11-18 18:44:10,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:44:10,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:44:10,971 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:44:10,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:44:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:44:11,172 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 18:44:11,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:44:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash 27123982, now seen corresponding path program 7 times [2022-11-18 18:44:11,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:44:11,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314876212] [2022-11-18 18:44:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:44:11,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:44:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:12,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:44:12,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314876212] [2022-11-18 18:44:12,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314876212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:44:12,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955294549] [2022-11-18 18:44:12,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 18:44:12,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:44:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:44:12,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:44:12,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:44:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:44:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:44:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:44:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 61 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:13,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:44:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:44:14,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955294549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:44:14,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:44:14,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:44:14,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383621226] [2022-11-18 18:44:14,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:44:14,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:44:14,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:44:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:44:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=3189, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:44:14,555 INFO L87 Difference]: Start difference. First operand 16661 states and 67135 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:48,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:45:48,379 INFO L93 Difference]: Finished difference Result 60672 states and 205705 transitions. [2022-11-18 18:45:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 543 states. [2022-11-18 18:45:48,379 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:45:48,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:45:48,743 INFO L225 Difference]: With dead ends: 60672 [2022-11-18 18:45:48,743 INFO L226 Difference]: Without dead ends: 60463 [2022-11-18 18:45:48,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 574 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165326 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=63417, Invalid=267783, Unknown=0, NotChecked=0, Total=331200 [2022-11-18 18:45:48,760 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2300 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10455 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2300 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 10455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:45:48,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2300 Valid, 0 Invalid, 11489 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1034 Valid, 10455 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-11-18 18:45:48,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60463 states. [2022-11-18 18:45:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60463 to 18061. [2022-11-18 18:45:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18061 states, 18060 states have (on average 4.085714285714285) internal successors, (73788), 18060 states have internal predecessors, (73788), 0 states have call successors, (0), 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 18:45:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18061 states to 18061 states and 73788 transitions. [2022-11-18 18:45:50,756 INFO L78 Accepts]: Start accepts. Automaton has 18061 states and 73788 transitions. Word has length 27 [2022-11-18 18:45:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:45:50,757 INFO L495 AbstractCegarLoop]: Abstraction has 18061 states and 73788 transitions. [2022-11-18 18:45:50,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:45:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 18061 states and 73788 transitions. [2022-11-18 18:45:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:45:50,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:45:50,799 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:45:50,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 18:45:51,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:51,005 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 18:45:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:45:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1808776398, now seen corresponding path program 8 times [2022-11-18 18:45:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:45:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988226977] [2022-11-18 18:45:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:45:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:45:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:45:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:51,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:45:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988226977] [2022-11-18 18:45:51,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988226977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:45:51,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266806674] [2022-11-18 18:45:51,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:45:51,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:45:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:45:51,978 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:45:51,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:45:52,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:45:52,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:45:52,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:45:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:45:53,053 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:53,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:45:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:45:54,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266806674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:45:54,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:45:54,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:45:54,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275997355] [2022-11-18 18:45:54,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:45:54,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:45:54,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:45:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:45:54,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=3191, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:45:54,253 INFO L87 Difference]: Start difference. First operand 18061 states and 73788 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:47:33,184 INFO L93 Difference]: Finished difference Result 62977 states and 213826 transitions. [2022-11-18 18:47:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2022-11-18 18:47:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 18:47:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:47:33,592 INFO L225 Difference]: With dead ends: 62977 [2022-11-18 18:47:33,592 INFO L226 Difference]: Without dead ends: 62795 [2022-11-18 18:47:33,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 604 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185909 ImplicationChecksByTransitivity, 85.7s TimeCoverageRelationStatistics Valid=69048, Invalid=297582, Unknown=0, NotChecked=0, Total=366630 [2022-11-18 18:47:33,607 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2423 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11030 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2423 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 12050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 11030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-18 18:47:33,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2423 Valid, 0 Invalid, 12050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1020 Valid, 11030 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-18 18:47:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62795 states. [2022-11-18 18:47:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62795 to 18404. [2022-11-18 18:47:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18404 states, 18403 states have (on average 4.117372167581372) internal successors, (75772), 18403 states have internal predecessors, (75772), 0 states have call successors, (0), 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 18:47:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18404 states to 18404 states and 75772 transitions. [2022-11-18 18:47:35,652 INFO L78 Accepts]: Start accepts. Automaton has 18404 states and 75772 transitions. Word has length 27 [2022-11-18 18:47:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:47:35,652 INFO L495 AbstractCegarLoop]: Abstraction has 18404 states and 75772 transitions. [2022-11-18 18:47:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:47:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 18404 states and 75772 transitions. [2022-11-18 18:47:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 18:47:35,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:47:35,708 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:47:35,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:47:35,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:35,914 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 18:47:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:47:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1407853966, now seen corresponding path program 9 times [2022-11-18 18:47:35,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:47:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258510270] [2022-11-18 18:47:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:47:35,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:47:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:47:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:36,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:47:36,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258510270] [2022-11-18 18:47:36,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258510270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:47:36,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752486111] [2022-11-18 18:47:36,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:47:36,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:47:36,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:47:36,874 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:47:36,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec209915-dd7f-48bd-b9e2-010220906c40/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:47:37,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 18:47:37,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:47:37,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 18:47:37,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:47:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 51 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:38,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:47:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:47:39,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752486111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:47:39,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:47:39,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2022-11-18 18:47:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964045422] [2022-11-18 18:47:39,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:47:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 18:47:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:47:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 18:47:39,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=3190, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 18:47:39,400 INFO L87 Difference]: Start difference. First operand 18404 states and 75772 transitions. Second operand has 62 states, 61 states have (on average 1.3278688524590163) internal successors, (81), 61 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)