./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/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_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/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_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/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 47d811dedd166243d18e0dd1600dbdc22509d3e45a6282042d09f76ff5301e3f --- 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 19:33:02,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:33:02,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:33:02,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:33:02,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:33:02,138 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:33:02,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:33:02,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:33:02,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:33:02,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:33:02,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:33:02,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:33:02,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:33:02,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:33:02,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:33:02,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:33:02,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:33:02,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:33:02,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:33:02,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:33:02,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:33:02,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:33:02,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:33:02,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:33:02,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:33:02,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:33:02,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:33:02,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:33:02,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:33:02,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:33:02,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:33:02,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:33:02,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:33:02,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:33:02,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:33:02,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:33:02,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:33:02,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:33:02,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:33:02,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:33:02,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:33:02,201 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 19:33:02,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:33:02,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:33:02,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:33:02,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:33:02,230 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:33:02,230 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:33:02,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:33:02,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:33:02,231 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:33:02,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:33:02,232 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:33:02,232 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:33:02,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:33:02,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:33:02,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:33:02,233 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 19:33:02,233 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 19:33:02,233 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 19:33:02,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:33:02,234 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:33:02,234 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:33:02,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:33:02,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:33:02,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:33:02,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:33:02,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:33:02,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:33:02,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:33:02,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:33:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:33:02,236 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_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47d811dedd166243d18e0dd1600dbdc22509d3e45a6282042d09f76ff5301e3f [2022-11-18 19:33:02,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:33:02,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:33:02,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:33:02,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:33:02,639 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:33:02,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2022-11-18 19:33:02,740 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/data/55849621a/25142ae3e08d4b22a192da7b54eef892/FLAG33d674e54 [2022-11-18 19:33:03,451 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:33:03,452 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/sv-benchmarks/c/pthread/fib_unsafe-6.i [2022-11-18 19:33:03,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/data/55849621a/25142ae3e08d4b22a192da7b54eef892/FLAG33d674e54 [2022-11-18 19:33:03,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/data/55849621a/25142ae3e08d4b22a192da7b54eef892 [2022-11-18 19:33:03,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:33:03,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:33:03,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:33:03,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:33:03,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:33:03,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:33:03" (1/1) ... [2022-11-18 19:33:03,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201255c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:03, skipping insertion in model container [2022-11-18 19:33:03,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:33:03" (1/1) ... [2022-11-18 19:33:03,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:33:03,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:33:04,384 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_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/sv-benchmarks/c/pthread/fib_unsafe-6.i[30243,30256] [2022-11-18 19:33:04,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:33:04,437 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:33:04,498 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_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/sv-benchmarks/c/pthread/fib_unsafe-6.i[30243,30256] [2022-11-18 19:33:04,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:33:04,572 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:33:04,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04 WrapperNode [2022-11-18 19:33:04,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:33:04,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:33:04,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:33:04,578 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:33:04,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,656 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-18 19:33:04,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:33:04,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:33:04,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:33:04,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:33:04,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,720 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:33:04,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:33:04,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:33:04,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:33:04,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (1/1) ... [2022-11-18 19:33:04,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:33:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:04,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:33:04,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:33:04,853 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 19:33:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 19:33:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 19:33:04,854 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 19:33:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:33:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:33:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:33:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:33:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:33:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:33:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:33:04,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:33:04,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:33:04,858 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 19:33:05,017 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:33:05,020 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:33:05,255 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:33:05,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:33:05,265 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:33:05,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:33:05 BoogieIcfgContainer [2022-11-18 19:33:05,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:33:05,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:33:05,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:33:05,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:33:05,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:33:03" (1/3) ... [2022-11-18 19:33:05,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f375670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:33:05, skipping insertion in model container [2022-11-18 19:33:05,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:33:04" (2/3) ... [2022-11-18 19:33:05,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f375670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:33:05, skipping insertion in model container [2022-11-18 19:33:05,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:33:05" (3/3) ... [2022-11-18 19:33:05,281 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2022-11-18 19:33:05,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:33:05,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-18 19:33:05,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:33:05,386 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 19:33:05,428 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 19:33:05,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-18 19:33:05,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-18 19:33:05,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-18 19:33:05,554 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-18 19:33:05,555 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:33:05,563 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 19:33:05,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-18 19:33:11,175 INFO L134 LiptonReduction]: Checked pairs total: 1734 [2022-11-18 19:33:11,175 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-18 19:33:11,186 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-18 19:33:11,208 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 19:33:11,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:33:11,240 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;@2840499c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:33:11,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 19:33:11,243 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 19:33:11,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-18 19:33:11,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:11,251 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-18 19:33:11,251 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 19:33:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash 416, now seen corresponding path program 1 times [2022-11-18 19:33:11,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:11,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603692657] [2022-11-18 19:33:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:11,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:11,410 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 19:33:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:11,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603692657] [2022-11-18 19:33:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603692657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:11,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:11,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-18 19:33:11,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588770292] [2022-11-18 19:33:11,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:11,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:33:11,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:33:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:33:11,461 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 19:33:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:11,531 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-18 19:33:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:33:11,534 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 19:33:11,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:11,558 INFO L225 Difference]: With dead ends: 50 [2022-11-18 19:33:11,558 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 19:33:11,560 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 19:33:11,566 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:11,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 19:33:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 19:33:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 19:33:11,625 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 19:33:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-18 19:33:11,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-18 19:33:11,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:11,633 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-18 19:33:11,639 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 19:33:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-18 19:33:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:33:11,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:11,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:33:11,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:33:11,643 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 19:33:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash 410520, now seen corresponding path program 1 times [2022-11-18 19:33:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:11,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900538871] [2022-11-18 19:33:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:11,948 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 19:33:11,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:11,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900538871] [2022-11-18 19:33:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900538871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:11,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:11,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:33:11,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430094376] [2022-11-18 19:33:11,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:11,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:11,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:11,953 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 19:33:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:12,007 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-18 19:33:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:12,008 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 19:33:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:12,010 INFO L225 Difference]: With dead ends: 47 [2022-11-18 19:33:12,012 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 19:33:12,012 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 19:33:12,014 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 19:33:12,019 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 19:33:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 19:33:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-18 19:33:12,029 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 19:33:12,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-18 19:33:12,031 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-18 19:33:12,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:12,048 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-18 19:33:12,048 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 19:33:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-18 19:33:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:33:12,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:12,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:33:12,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:33:12,050 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 19:33:12,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 410521, now seen corresponding path program 1 times [2022-11-18 19:33:12,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:12,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211112955] [2022-11-18 19:33:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:12,212 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 19:33:12,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211112955] [2022-11-18 19:33:12,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211112955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:12,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:12,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:33:12,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744807206] [2022-11-18 19:33:12,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:12,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:12,216 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 19:33:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:12,260 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-18 19:33:12,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:12,261 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 19:33:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:12,263 INFO L225 Difference]: With dead ends: 44 [2022-11-18 19:33:12,264 INFO L226 Difference]: Without dead ends: 44 [2022-11-18 19:33:12,265 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 19:33:12,267 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 19:33:12,269 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 19:33:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-18 19:33:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-18 19:33:12,280 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 19:33:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-18 19:33:12,285 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-18 19:33:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:12,286 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-18 19:33:12,286 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 19:33:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-18 19:33:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:33:12,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:12,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:33:12,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:33:12,290 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 19:33:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash -654854385, now seen corresponding path program 1 times [2022-11-18 19:33:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885359481] [2022-11-18 19:33:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:12,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:12,412 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 19:33:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885359481] [2022-11-18 19:33:12,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885359481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:12,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:12,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:33:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570302598] [2022-11-18 19:33:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:12,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:12,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:12,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:12,428 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 19:33:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:12,492 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-18 19:33:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:12,493 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 19:33:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:12,495 INFO L225 Difference]: With dead ends: 53 [2022-11-18 19:33:12,495 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 19:33:12,495 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 19:33:12,499 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 19:33:12,501 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 19:33:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 19:33:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 19:33:12,521 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 19:33:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-18 19:33:12,527 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-18 19:33:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:12,528 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-18 19:33:12,530 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 19:33:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-18 19:33:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:33:12,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:12,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:12,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:33:12,533 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 19:33:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:12,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1174350712, now seen corresponding path program 1 times [2022-11-18 19:33:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:12,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973886752] [2022-11-18 19:33:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:12,658 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 19:33:12,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973886752] [2022-11-18 19:33:12,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973886752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750249088] [2022-11-18 19:33:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:12,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:12,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:12,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:33:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:33:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:12,865 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 19:33:12,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:12,903 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 19:33:12,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750249088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:12,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 19:33:12,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801419733] [2022-11-18 19:33:12,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:12,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:33:12,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:33:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:33:12,906 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 19:33:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:13,034 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-18 19:33:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:33:13,035 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 19:33:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:13,036 INFO L225 Difference]: With dead ends: 80 [2022-11-18 19:33:13,037 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 19:33:13,037 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 19:33:13,038 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 19:33:13,038 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 19:33:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 19:33:13,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-18 19:33:13,059 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 19:33:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-18 19:33:13,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-18 19:33:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:13,061 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-18 19:33:13,062 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 19:33:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-18 19:33:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 19:33:13,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:13,064 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:13,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:13,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:13,273 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 19:33:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1721366193, now seen corresponding path program 2 times [2022-11-18 19:33:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:13,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908878305] [2022-11-18 19:33:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:13,450 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 19:33:13,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:13,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908878305] [2022-11-18 19:33:13,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908878305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:13,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324112793] [2022-11-18 19:33:13,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:13,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:13,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:13,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:13,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:33:13,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:33:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:13,634 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 19:33:13,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:13,720 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 19:33:13,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324112793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:13,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:13,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 19:33:13,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632182994] [2022-11-18 19:33:13,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:13,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:33:13,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:33:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:33:13,726 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 19:33:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:13,936 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-18 19:33:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:33:13,937 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 19:33:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:13,939 INFO L225 Difference]: With dead ends: 134 [2022-11-18 19:33:13,939 INFO L226 Difference]: Without dead ends: 134 [2022-11-18 19:33:13,940 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 19:33:13,941 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:13,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:33:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-18 19:33:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-18 19:33:13,952 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 19:33:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-18 19:33:13,983 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-18 19:33:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:13,984 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-18 19:33:13,984 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 19:33:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-18 19:33:13,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 19:33:13,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:13,986 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:14,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:14,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 19:33:14,201 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 19:33:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:14,201 INFO L85 PathProgramCache]: Analyzing trace with hash 109095087, now seen corresponding path program 3 times [2022-11-18 19:33:14,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:14,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116990195] [2022-11-18 19:33:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:14,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:14,545 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 19:33:14,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116990195] [2022-11-18 19:33:14,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116990195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:14,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589490152] [2022-11-18 19:33:14,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:33:14,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:14,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:14,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:14,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:33:14,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 19:33:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:33:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:14,750 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 19:33:14,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:14,958 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 19:33:14,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589490152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:14,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:14,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-11-18 19:33:14,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585355901] [2022-11-18 19:33:14,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:14,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:33:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:14,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:33:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:33:14,962 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:15,227 INFO L93 Difference]: Finished difference Result 170 states and 500 transitions. [2022-11-18 19:33:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 19:33:15,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 19:33:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:15,241 INFO L225 Difference]: With dead ends: 170 [2022-11-18 19:33:15,241 INFO L226 Difference]: Without dead ends: 170 [2022-11-18 19:33:15,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:33:15,242 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:15,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:33:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-18 19:33:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-18 19:33:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 2.9761904761904763) internal successors, (500), 169 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 500 transitions. [2022-11-18 19:33:15,273 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 500 transitions. Word has length 16 [2022-11-18 19:33:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:15,273 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 500 transitions. [2022-11-18 19:33:15,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 500 transitions. [2022-11-18 19:33:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 19:33:15,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:15,278 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:15,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:15,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 19:33:15,486 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 19:33:15,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash 266152687, now seen corresponding path program 4 times [2022-11-18 19:33:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:15,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320054322] [2022-11-18 19:33:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:15,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:16,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:16,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320054322] [2022-11-18 19:33:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320054322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:16,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472287475] [2022-11-18 19:33:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:33:16,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:16,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:16,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:16,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:33:16,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:33:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:33:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:17,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:19,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472287475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:19,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:19,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-18 19:33:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810810135] [2022-11-18 19:33:19,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-18 19:33:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-18 19:33:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 19:33:19,043 INFO L87 Difference]: Start difference. First operand 170 states and 500 transitions. Second operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:39,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:39,989 INFO L93 Difference]: Finished difference Result 11101 states and 32953 transitions. [2022-11-18 19:33:39,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-11-18 19:33:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 19:33:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:40,083 INFO L225 Difference]: With dead ends: 11101 [2022-11-18 19:33:40,083 INFO L226 Difference]: Without dead ends: 11101 [2022-11-18 19:33:40,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25151 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=11989, Invalid=44893, Unknown=0, NotChecked=0, Total=56882 [2022-11-18 19:33:40,098 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2565 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2565 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:40,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2565 Valid, 0 Invalid, 2811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 19:33:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2022-11-18 19:33:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 8418. [2022-11-18 19:33:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8416 states have (on average 3.301093155893536) internal successors, (27782), 8417 states have internal predecessors, (27782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:40,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 27782 transitions. [2022-11-18 19:33:40,531 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 27782 transitions. Word has length 20 [2022-11-18 19:33:40,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:40,532 INFO L495 AbstractCegarLoop]: Abstraction has 8418 states and 27782 transitions. [2022-11-18 19:33:40,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 27782 transitions. [2022-11-18 19:33:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 19:33:40,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:40,643 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:40,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:40,850 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 19:33:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash 266152692, now seen corresponding path program 1 times [2022-11-18 19:33:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:40,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180850987] [2022-11-18 19:33:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:40,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-18 19:33:41,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180850987] [2022-11-18 19:33:41,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180850987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:41,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:33:41,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:33:41,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657612746] [2022-11-18 19:33:41,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:41,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:33:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:41,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:33:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:33:41,217 INFO L87 Difference]: Start difference. First operand 8418 states and 27782 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 19:33:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:41,296 INFO L93 Difference]: Finished difference Result 8409 states and 26843 transitions. [2022-11-18 19:33:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:33:41,297 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 20 [2022-11-18 19:33:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:41,351 INFO L225 Difference]: With dead ends: 8409 [2022-11-18 19:33:41,351 INFO L226 Difference]: Without dead ends: 8393 [2022-11-18 19:33:41,352 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 19:33:41,353 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 19:33:41,353 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 19:33:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-11-18 19:33:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8274. [2022-11-18 19:33:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8273 states have (on average 3.2244651275232683) internal successors, (26676), 8273 states have internal predecessors, (26676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 26676 transitions. [2022-11-18 19:33:41,879 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 26676 transitions. Word has length 20 [2022-11-18 19:33:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:41,879 INFO L495 AbstractCegarLoop]: Abstraction has 8274 states and 26676 transitions. [2022-11-18 19:33:41,880 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 19:33:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 26676 transitions. [2022-11-18 19:33:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 19:33:41,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:41,905 INFO L195 NwaCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:41,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:33:41,905 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 19:33:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1595589014, now seen corresponding path program 1 times [2022-11-18 19:33:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:41,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140251418] [2022-11-18 19:33:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:41,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 106 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:42,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:42,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140251418] [2022-11-18 19:33:42,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140251418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:42,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380736046] [2022-11-18 19:33:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:42,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:42,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:42,256 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:42,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:33:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:33:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:42,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:33:42,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380736046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:33:42,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:33:42,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [17] total 18 [2022-11-18 19:33:42,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135293081] [2022-11-18 19:33:42,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:33:42,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:33:42,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:33:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:33:42,422 INFO L87 Difference]: Start difference. First operand 8274 states and 26676 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:42,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:33:42,780 INFO L93 Difference]: Finished difference Result 8393 states and 25875 transitions. [2022-11-18 19:33:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 19:33:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 19:33:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:33:42,820 INFO L225 Difference]: With dead ends: 8393 [2022-11-18 19:33:42,820 INFO L226 Difference]: Without dead ends: 8272 [2022-11-18 19:33:42,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:33:42,823 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:33:42,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:33:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8272 states. [2022-11-18 19:33:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8272 to 762. [2022-11-18 19:33:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.923784494086728) internal successors, (2225), 761 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2225 transitions. [2022-11-18 19:33:43,020 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2225 transitions. Word has length 23 [2022-11-18 19:33:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:33:43,021 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 2225 transitions. [2022-11-18 19:33:43,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:33:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2225 transitions. [2022-11-18 19:33:43,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 19:33:43,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:33:43,030 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:33:43,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:33:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 19:33:43,236 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 19:33:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:33:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1595588549, now seen corresponding path program 2 times [2022-11-18 19:33:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:33:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079817716] [2022-11-18 19:33:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:33:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:33:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:33:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:44,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:33:44,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079817716] [2022-11-18 19:33:44,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079817716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:33:44,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089555781] [2022-11-18 19:33:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:33:44,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:33:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:33:44,222 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:33:44,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:33:44,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:33:44,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:33:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:33:44,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:33:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:45,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:33:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:33:46,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089555781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:33:46,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:33:46,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-18 19:33:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785127362] [2022-11-18 19:33:46,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:33:46,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 19:33:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:33:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 19:33:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2300, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 19:33:46,491 INFO L87 Difference]: Start difference. First operand 762 states and 2225 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:19,495 INFO L93 Difference]: Finished difference Result 11779 states and 34167 transitions. [2022-11-18 19:34:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-11-18 19:34:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 19:34:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:19,542 INFO L225 Difference]: With dead ends: 11779 [2022-11-18 19:34:19,542 INFO L226 Difference]: Without dead ends: 11693 [2022-11-18 19:34:19,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35086 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=22635, Invalid=60597, Unknown=0, NotChecked=0, Total=83232 [2022-11-18 19:34:19,550 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2411 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3893 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2411 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 3893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:19,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2411 Valid, 0 Invalid, 4584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 3893 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-18 19:34:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11693 states. [2022-11-18 19:34:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11693 to 1316. [2022-11-18 19:34:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.149809885931559) internal successors, (4142), 1315 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4142 transitions. [2022-11-18 19:34:19,687 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4142 transitions. Word has length 23 [2022-11-18 19:34:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:19,687 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 4142 transitions. [2022-11-18 19:34:19,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4142 transitions. [2022-11-18 19:34:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 19:34:19,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:19,692 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:19,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:19,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:19,904 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 19:34:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1717075563, now seen corresponding path program 1 times [2022-11-18 19:34:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:19,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558147389] [2022-11-18 19:34:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:20,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558147389] [2022-11-18 19:34:20,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558147389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:20,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740498600] [2022-11-18 19:34:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:20,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:20,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:20,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:20,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:34:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:21,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:34:21,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:21,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:23,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740498600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:23,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:23,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-18 19:34:23,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398118617] [2022-11-18 19:34:23,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:23,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 19:34:23,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 19:34:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=2300, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 19:34:23,121 INFO L87 Difference]: Start difference. First operand 1316 states and 4142 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:34:55,766 INFO L93 Difference]: Finished difference Result 13217 states and 38920 transitions. [2022-11-18 19:34:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2022-11-18 19:34:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 19:34:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:34:55,822 INFO L225 Difference]: With dead ends: 13217 [2022-11-18 19:34:55,822 INFO L226 Difference]: Without dead ends: 13132 [2022-11-18 19:34:55,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35029 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=22635, Invalid=60597, Unknown=0, NotChecked=0, Total=83232 [2022-11-18 19:34:55,832 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2355 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3879 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 3879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:34:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2355 Valid, 0 Invalid, 4555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 3879 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-18 19:34:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13132 states. [2022-11-18 19:34:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13132 to 1799. [2022-11-18 19:34:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.272525027808676) internal successors, (5884), 1798 states have internal predecessors, (5884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5884 transitions. [2022-11-18 19:34:56,059 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5884 transitions. Word has length 23 [2022-11-18 19:34:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:34:56,060 INFO L495 AbstractCegarLoop]: Abstraction has 1799 states and 5884 transitions. [2022-11-18 19:34:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:34:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5884 transitions. [2022-11-18 19:34:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 19:34:56,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:34:56,066 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:34:56,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 19:34:56,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:56,272 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 19:34:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:34:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash -560014678, now seen corresponding path program 1 times [2022-11-18 19:34:56,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:34:56,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864937529] [2022-11-18 19:34:56,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:56,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:34:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:57,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:34:57,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864937529] [2022-11-18 19:34:57,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864937529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:34:57,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057356461] [2022-11-18 19:34:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:34:57,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:34:57,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:34:57,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:34:57,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 19:34:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:34:57,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:34:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:34:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:58,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:34:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:34:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057356461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:34:59,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:34:59,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-18 19:34:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670862586] [2022-11-18 19:34:59,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:34:59,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 19:34:59,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:34:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 19:34:59,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2298, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 19:34:59,122 INFO L87 Difference]: Start difference. First operand 1799 states and 5884 transitions. Second operand has 53 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:35:35,143 INFO L93 Difference]: Finished difference Result 27714 states and 86718 transitions. [2022-11-18 19:35:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 316 states. [2022-11-18 19:35:35,148 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 19:35:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:35:35,248 INFO L225 Difference]: With dead ends: 27714 [2022-11-18 19:35:35,248 INFO L226 Difference]: Without dead ends: 27658 [2022-11-18 19:35:35,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53376 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=26679, Invalid=94773, Unknown=0, NotChecked=0, Total=121452 [2022-11-18 19:35:35,257 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1980 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5805 mSolverCounterSat, 643 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 643 IncrementalHoareTripleChecker+Valid, 5805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:35:35,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1980 Valid, 0 Invalid, 6448 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [643 Valid, 5805 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 19:35:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27658 states. [2022-11-18 19:35:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27658 to 3782. [2022-11-18 19:35:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 3.5204972229568896) internal successors, (13311), 3781 states have internal predecessors, (13311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 13311 transitions. [2022-11-18 19:35:35,825 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 13311 transitions. Word has length 24 [2022-11-18 19:35:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:35:35,825 INFO L495 AbstractCegarLoop]: Abstraction has 3782 states and 13311 transitions. [2022-11-18 19:35:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 13311 transitions. [2022-11-18 19:35:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 19:35:35,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:35:35,840 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:35,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:36,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:36,047 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 19:35:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1557087992, now seen corresponding path program 2 times [2022-11-18 19:35:36,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:36,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687780766] [2022-11-18 19:35:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:36,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:36,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:36,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687780766] [2022-11-18 19:35:36,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687780766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:36,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889669290] [2022-11-18 19:35:36,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:35:36,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:36,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:36,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:36,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 19:35:37,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:35:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:35:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 19:35:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:37,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:38,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889669290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:38,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:35:38,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-18 19:35:38,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910878228] [2022-11-18 19:35:38,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:38,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 19:35:38,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 19:35:38,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2298, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 19:35:38,946 INFO L87 Difference]: Start difference. First operand 3782 states and 13311 transitions. Second operand has 53 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:36:14,789 INFO L93 Difference]: Finished difference Result 36170 states and 115594 transitions. [2022-11-18 19:36:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 316 states. [2022-11-18 19:36:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-18 19:36:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:36:14,905 INFO L225 Difference]: With dead ends: 36170 [2022-11-18 19:36:14,905 INFO L226 Difference]: Without dead ends: 36114 [2022-11-18 19:36:14,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52960 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=26679, Invalid=94773, Unknown=0, NotChecked=0, Total=121452 [2022-11-18 19:36:14,911 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1945 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5778 mSolverCounterSat, 647 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 647 IncrementalHoareTripleChecker+Valid, 5778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:36:14,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1945 Valid, 0 Invalid, 6425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [647 Valid, 5778 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-18 19:36:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36114 states. [2022-11-18 19:36:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36114 to 6218. [2022-11-18 19:36:15,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6217 states have (on average 3.6829660608010295) internal successors, (22897), 6217 states have internal predecessors, (22897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 22897 transitions. [2022-11-18 19:36:15,751 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 22897 transitions. Word has length 24 [2022-11-18 19:36:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:36:15,752 INFO L495 AbstractCegarLoop]: Abstraction has 6218 states and 22897 transitions. [2022-11-18 19:36:15,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 22897 transitions. [2022-11-18 19:36:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:36:15,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:36:15,777 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:15,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 19:36:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:36:15,984 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 19:36:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash -543766444, now seen corresponding path program 3 times [2022-11-18 19:36:15,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:15,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045934800] [2022-11-18 19:36:15,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:15,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:16,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045934800] [2022-11-18 19:36:16,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045934800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:36:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907906243] [2022-11-18 19:36:16,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:36:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:16,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:36:16,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 19:36:16,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 19:36:16,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:36:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:36:17,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:36:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:17,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:36:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:19,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907906243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:36:19,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:36:19,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:36:19,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026950733] [2022-11-18 19:36:19,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:36:19,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:36:19,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:19,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:36:19,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:36:19,038 INFO L87 Difference]: Start difference. First operand 6218 states and 22897 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:00,750 INFO L93 Difference]: Finished difference Result 43612 states and 142460 transitions. [2022-11-18 19:37:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 340 states. [2022-11-18 19:37:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:00,892 INFO L225 Difference]: With dead ends: 43612 [2022-11-18 19:37:00,893 INFO L226 Difference]: Without dead ends: 43592 [2022-11-18 19:37:00,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58765 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=30981, Invalid=108521, Unknown=0, NotChecked=0, Total=139502 [2022-11-18 19:37:00,901 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2586 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4823 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2586 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 4823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:00,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2586 Valid, 0 Invalid, 5530 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [707 Valid, 4823 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-18 19:37:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43592 states. [2022-11-18 19:37:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43592 to 7168. [2022-11-18 19:37:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7168 states, 7167 states have (on average 3.759871633877494) internal successors, (26947), 7167 states have internal predecessors, (26947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7168 states to 7168 states and 26947 transitions. [2022-11-18 19:37:01,733 INFO L78 Accepts]: Start accepts. Automaton has 7168 states and 26947 transitions. Word has length 25 [2022-11-18 19:37:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:37:01,733 INFO L495 AbstractCegarLoop]: Abstraction has 7168 states and 26947 transitions. [2022-11-18 19:37:01,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7168 states and 26947 transitions. [2022-11-18 19:37:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:37:01,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:37:01,768 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:01,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 19:37:01,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:37:01,975 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 19:37:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash -194438482, now seen corresponding path program 4 times [2022-11-18 19:37:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:01,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842733220] [2022-11-18 19:37:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:01,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:37:02,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:02,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842733220] [2022-11-18 19:37:02,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842733220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:37:02,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512059352] [2022-11-18 19:37:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:37:02,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:02,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:02,832 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:37:02,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 19:37:02,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:37:02,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:37:02,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:37:02,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:37:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:37:03,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:37:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:37:04,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512059352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:37:04,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:37:04,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:37:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145431163] [2022-11-18 19:37:04,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:37:04,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:37:04,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:04,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:37:04,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=2568, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:37:04,999 INFO L87 Difference]: Start difference. First operand 7168 states and 26947 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:37:49,047 INFO L93 Difference]: Finished difference Result 19231 states and 62876 transitions. [2022-11-18 19:37:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 358 states. [2022-11-18 19:37:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:37:49,095 INFO L225 Difference]: With dead ends: 19231 [2022-11-18 19:37:49,095 INFO L226 Difference]: Without dead ends: 19177 [2022-11-18 19:37:49,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70283 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=29648, Invalid=122062, Unknown=0, NotChecked=0, Total=151710 [2022-11-18 19:37:49,102 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1873 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6747 mSolverCounterSat, 826 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 826 IncrementalHoareTripleChecker+Valid, 6747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:37:49,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1873 Valid, 0 Invalid, 7573 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [826 Valid, 6747 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-18 19:37:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19177 states. [2022-11-18 19:37:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19177 to 7718. [2022-11-18 19:37:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7718 states, 7717 states have (on average 3.8047168588829856) internal successors, (29361), 7717 states have internal predecessors, (29361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:37:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7718 states to 7718 states and 29361 transitions. [2022-11-18 19:37:49,563 INFO L78 Accepts]: Start accepts. Automaton has 7718 states and 29361 transitions. Word has length 25 [2022-11-18 19:37:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:37:49,563 INFO L495 AbstractCegarLoop]: Abstraction has 7718 states and 29361 transitions. [2022-11-18 19:37:49,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:37:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7718 states and 29361 transitions. [2022-11-18 19:37:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:37:49,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:37:49,591 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:37:49,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 19:37:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:37:49,797 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 19:37:49,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:37:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash -622535152, now seen corresponding path program 5 times [2022-11-18 19:37:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:37:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014564086] [2022-11-18 19:37:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:37:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:37:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:37:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:37:50,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:37:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014564086] [2022-11-18 19:37:50,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014564086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:37:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216677601] [2022-11-18 19:37:50,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:37:50,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:37:50,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:37:50,547 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:37:50,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 19:37:50,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 19:37:50,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:37:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:37:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:37:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:37:51,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:37:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:37:52,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216677601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:37:52,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:37:52,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:37:52,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476675471] [2022-11-18 19:37:52,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:37:52,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:37:52,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:37:52,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:37:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=2568, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:37:52,738 INFO L87 Difference]: Start difference. First operand 7718 states and 29361 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:38:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:38:46,297 INFO L93 Difference]: Finished difference Result 28659 states and 94346 transitions. [2022-11-18 19:38:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 423 states. [2022-11-18 19:38:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:38:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:38:46,370 INFO L225 Difference]: With dead ends: 28659 [2022-11-18 19:38:46,370 INFO L226 Difference]: Without dead ends: 28546 [2022-11-18 19:38:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102329 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=42038, Invalid=163624, Unknown=0, NotChecked=0, Total=205662 [2022-11-18 19:38:46,379 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1754 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7835 mSolverCounterSat, 883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 7835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:38:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 0 Invalid, 8718 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [883 Valid, 7835 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-18 19:38:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28546 states. [2022-11-18 19:38:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28546 to 9433. [2022-11-18 19:38:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9432 states have (on average 3.8829516539440205) internal successors, (36624), 9432 states have internal predecessors, (36624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:38:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 36624 transitions. [2022-11-18 19:38:47,158 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 36624 transitions. Word has length 25 [2022-11-18 19:38:47,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:38:47,159 INFO L495 AbstractCegarLoop]: Abstraction has 9433 states and 36624 transitions. [2022-11-18 19:38:47,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:38:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 36624 transitions. [2022-11-18 19:38:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:38:47,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:38:47,189 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:38:47,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 19:38:47,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 19:38:47,395 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 19:38:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:38:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash 279667346, now seen corresponding path program 6 times [2022-11-18 19:38:47,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:38:47,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601946691] [2022-11-18 19:38:47,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:38:47,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:38:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:38:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:38:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601946691] [2022-11-18 19:38:48,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601946691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:38:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622182497] [2022-11-18 19:38:48,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:38:48,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:38:48,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:38:48,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:38:48,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 19:38:48,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-18 19:38:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:38:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:38:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:38:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 48 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:49,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:38:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:38:50,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622182497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:38:50,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:38:50,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:38:50,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263235295] [2022-11-18 19:38:50,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:38:50,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:38:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:38:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:38:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2595, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:38:50,364 INFO L87 Difference]: Start difference. First operand 9433 states and 36624 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:39:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:39:59,783 INFO L93 Difference]: Finished difference Result 36910 states and 121746 transitions. [2022-11-18 19:39:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 459 states. [2022-11-18 19:39:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:39:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:39:59,897 INFO L225 Difference]: With dead ends: 36910 [2022-11-18 19:39:59,897 INFO L226 Difference]: Without dead ends: 36679 [2022-11-18 19:39:59,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 487 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118666 ImplicationChecksByTransitivity, 59.8s TimeCoverageRelationStatistics Valid=46277, Invalid=192355, Unknown=0, NotChecked=0, Total=238632 [2022-11-18 19:39:59,907 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1704 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9093 mSolverCounterSat, 956 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 9093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:39:59,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 0 Invalid, 10049 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [956 Valid, 9093 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 19:39:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36679 states. [2022-11-18 19:40:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36679 to 10467. [2022-11-18 19:40:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.9524173514236574) internal successors, (41366), 10466 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:40:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 41366 transitions. [2022-11-18 19:40:01,087 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 41366 transitions. Word has length 25 [2022-11-18 19:40:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:40:01,087 INFO L495 AbstractCegarLoop]: Abstraction has 10467 states and 41366 transitions. [2022-11-18 19:40:01,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:40:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 41366 transitions. [2022-11-18 19:40:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:40:01,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:40:01,118 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:40:01,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:40:01,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 19:40:01,320 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 19:40:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:40:01,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1190276078, now seen corresponding path program 7 times [2022-11-18 19:40:01,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:40:01,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598440104] [2022-11-18 19:40:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:40:01,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:40:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:02,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:40:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598440104] [2022-11-18 19:40:02,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598440104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:40:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842713312] [2022-11-18 19:40:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:40:02,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:40:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:40:02,108 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:40:02,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 19:40:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:40:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:40:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:40:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:40:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:40:04,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842713312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:40:04,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:40:04,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:40:04,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236669174] [2022-11-18 19:40:04,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:40:04,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:40:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:40:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:40:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:40:04,119 INFO L87 Difference]: Start difference. First operand 10467 states and 41366 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:41:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:41:08,713 INFO L93 Difference]: Finished difference Result 37680 states and 124320 transitions. [2022-11-18 19:41:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 448 states. [2022-11-18 19:41:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:41:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:41:08,825 INFO L225 Difference]: With dead ends: 37680 [2022-11-18 19:41:08,825 INFO L226 Difference]: Without dead ends: 37541 [2022-11-18 19:41:08,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 475 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112458 ImplicationChecksByTransitivity, 56.1s TimeCoverageRelationStatistics Valid=43915, Invalid=183137, Unknown=0, NotChecked=0, Total=227052 [2022-11-18 19:41:08,834 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1863 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8465 mSolverCounterSat, 844 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 844 IncrementalHoareTripleChecker+Valid, 8465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:41:08,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1863 Valid, 0 Invalid, 9309 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [844 Valid, 8465 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-18 19:41:08,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37541 states. [2022-11-18 19:41:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37541 to 11033. [2022-11-18 19:41:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11033 states, 11032 states have (on average 4.006254532269761) internal successors, (44197), 11032 states have internal predecessors, (44197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:41:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11033 states to 11033 states and 44197 transitions. [2022-11-18 19:41:09,738 INFO L78 Accepts]: Start accepts. Automaton has 11033 states and 44197 transitions. Word has length 25 [2022-11-18 19:41:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:41:09,738 INFO L495 AbstractCegarLoop]: Abstraction has 11033 states and 44197 transitions. [2022-11-18 19:41:09,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:41:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 11033 states and 44197 transitions. [2022-11-18 19:41:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:41:09,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:41:09,761 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:41:09,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 19:41:09,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:41:09,961 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 19:41:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:41:09,962 INFO L85 PathProgramCache]: Analyzing trace with hash -645624302, now seen corresponding path program 8 times [2022-11-18 19:41:09,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:41:09,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221900699] [2022-11-18 19:41:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:41:09,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:41:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:41:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:41:10,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:41:10,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221900699] [2022-11-18 19:41:10,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221900699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:41:10,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695691345] [2022-11-18 19:41:10,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:41:10,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:41:10,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:41:10,965 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:41:10,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 19:41:11,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:41:11,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:41:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:41:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:41:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:41:11,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:41:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:41:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695691345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:41:12,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:41:12,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:41:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299956896] [2022-11-18 19:41:12,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:41:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:41:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:41:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:41:12,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:41:12,971 INFO L87 Difference]: Start difference. First operand 11033 states and 44197 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:42:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:42:20,732 INFO L93 Difference]: Finished difference Result 39664 states and 130806 transitions. [2022-11-18 19:42:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 475 states. [2022-11-18 19:42:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:42:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:42:20,847 INFO L225 Difference]: With dead ends: 39664 [2022-11-18 19:42:20,847 INFO L226 Difference]: Without dead ends: 39550 [2022-11-18 19:42:20,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 501 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126920 ImplicationChecksByTransitivity, 58.5s TimeCoverageRelationStatistics Valid=49233, Invalid=203273, Unknown=0, NotChecked=0, Total=252506 [2022-11-18 19:42:20,857 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1974 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9345 mSolverCounterSat, 851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 9345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:42:20,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1974 Valid, 0 Invalid, 10196 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [851 Valid, 9345 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-18 19:42:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39550 states. [2022-11-18 19:42:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39550 to 11222. [2022-11-18 19:42:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11222 states, 11221 states have (on average 4.033241244095891) internal successors, (45257), 11221 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:42:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11222 states to 11222 states and 45257 transitions. [2022-11-18 19:42:21,964 INFO L78 Accepts]: Start accepts. Automaton has 11222 states and 45257 transitions. Word has length 25 [2022-11-18 19:42:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:42:21,964 INFO L495 AbstractCegarLoop]: Abstraction has 11222 states and 45257 transitions. [2022-11-18 19:42:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:42:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 11222 states and 45257 transitions. [2022-11-18 19:42:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:42:21,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:42:21,985 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:21,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:42:22,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:42:22,186 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 19:42:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:22,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1723961234, now seen corresponding path program 9 times [2022-11-18 19:42:22,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:22,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63876636] [2022-11-18 19:42:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:22,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:22,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:22,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63876636] [2022-11-18 19:42:22,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63876636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:42:22,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434050123] [2022-11-18 19:42:22,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 19:42:22,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:42:22,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:42:22,896 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:42:22,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 19:42:23,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-18 19:42:23,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:42:23,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:42:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:23,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434050123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:24,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:42:24,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:42:24,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672217921] [2022-11-18 19:42:24,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:24,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:42:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:24,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:42:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=2593, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:42:24,842 INFO L87 Difference]: Start difference. First operand 11222 states and 45257 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:43:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:43:37,870 INFO L93 Difference]: Finished difference Result 41651 states and 137427 transitions. [2022-11-18 19:43:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2022-11-18 19:43:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:43:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:43:37,991 INFO L225 Difference]: With dead ends: 41651 [2022-11-18 19:43:37,992 INFO L226 Difference]: Without dead ends: 41578 [2022-11-18 19:43:38,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147545 ImplicationChecksByTransitivity, 63.5s TimeCoverageRelationStatistics Valid=56241, Invalid=238065, Unknown=0, NotChecked=0, Total=294306 [2022-11-18 19:43:38,003 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2140 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8554 mSolverCounterSat, 948 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 948 IncrementalHoareTripleChecker+Valid, 8554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-18 19:43:38,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2140 Valid, 0 Invalid, 9502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [948 Valid, 8554 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-18 19:43:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41578 states. [2022-11-18 19:43:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41578 to 11324. [2022-11-18 19:43:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 11323 states have (on average 4.046895699019695) internal successors, (45823), 11323 states have internal predecessors, (45823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:43:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 45823 transitions. [2022-11-18 19:43:39,010 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 45823 transitions. Word has length 25 [2022-11-18 19:43:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:43:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 11324 states and 45823 transitions. [2022-11-18 19:43:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:43:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 45823 transitions. [2022-11-18 19:43:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:43:39,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:43:39,035 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:43:39,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-18 19:43:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:39,236 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 19:43:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:43:39,236 INFO L85 PathProgramCache]: Analyzing trace with hash -792667758, now seen corresponding path program 10 times [2022-11-18 19:43:39,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:43:39,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732972381] [2022-11-18 19:43:39,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:43:39,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:43:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:43:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:39,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:43:39,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732972381] [2022-11-18 19:43:39,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732972381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:43:39,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861787642] [2022-11-18 19:43:39,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:43:39,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:43:39,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:43:39,951 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:43:39,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 19:43:40,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:43:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:43:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:43:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:43:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:41,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:43:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:43:42,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861787642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:43:42,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:43:42,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:43:42,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577208493] [2022-11-18 19:43:42,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:43:42,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:43:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:43:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:43:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2587, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:43:42,051 INFO L87 Difference]: Start difference. First operand 11324 states and 45823 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:45:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:45:02,233 INFO L93 Difference]: Finished difference Result 45070 states and 148910 transitions. [2022-11-18 19:45:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2022-11-18 19:45:02,233 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:45:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:45:02,374 INFO L225 Difference]: With dead ends: 45070 [2022-11-18 19:45:02,374 INFO L226 Difference]: Without dead ends: 44985 [2022-11-18 19:45:02,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160480 ImplicationChecksByTransitivity, 69.8s TimeCoverageRelationStatistics Valid=61972, Invalid=262358, Unknown=0, NotChecked=0, Total=324330 [2022-11-18 19:45:02,387 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2192 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8929 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 8929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:45:02,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2192 Valid, 0 Invalid, 9832 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [903 Valid, 8929 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-18 19:45:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44985 states. [2022-11-18 19:45:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44985 to 11407. [2022-11-18 19:45:03,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11407 states, 11406 states have (on average 4.057513589338944) internal successors, (46280), 11406 states have internal predecessors, (46280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11407 states to 11407 states and 46280 transitions. [2022-11-18 19:45:03,510 INFO L78 Accepts]: Start accepts. Automaton has 11407 states and 46280 transitions. Word has length 25 [2022-11-18 19:45:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:45:03,510 INFO L495 AbstractCegarLoop]: Abstraction has 11407 states and 46280 transitions. [2022-11-18 19:45:03,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:45:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11407 states and 46280 transitions. [2022-11-18 19:45:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:45:03,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:45:03,535 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:03,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:03,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 19:45:03,742 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 19:45:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1987341074, now seen corresponding path program 11 times [2022-11-18 19:45:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841258170] [2022-11-18 19:45:03,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:03,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:04,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841258170] [2022-11-18 19:45:04,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841258170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107955639] [2022-11-18 19:45:04,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 19:45:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:04,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:04,737 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 19:45:04,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 19:45:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 19:45:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:05,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107955639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:06,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:45:06,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:45:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334978463] [2022-11-18 19:45:06,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:06,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:45:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:45:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=2578, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:45:06,741 INFO L87 Difference]: Start difference. First operand 11407 states and 46280 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:46:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:46:37,074 INFO L93 Difference]: Finished difference Result 50112 states and 165668 transitions. [2022-11-18 19:46:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 615 states. [2022-11-18 19:46:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:46:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:46:37,256 INFO L225 Difference]: With dead ends: 50112 [2022-11-18 19:46:37,256 INFO L226 Difference]: Without dead ends: 49962 [2022-11-18 19:46:37,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 630 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197956 ImplicationChecksByTransitivity, 77.9s TimeCoverageRelationStatistics Valid=75929, Invalid=322863, Unknown=0, NotChecked=0, Total=398792 [2022-11-18 19:46:37,276 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2414 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10152 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2414 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 10152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-18 19:46:37,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2414 Valid, 0 Invalid, 11155 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1003 Valid, 10152 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-18 19:46:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49962 states. [2022-11-18 19:46:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49962 to 11452. [2022-11-18 19:46:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11452 states, 11451 states have (on average 4.057549558990481) internal successors, (46463), 11451 states have internal predecessors, (46463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11452 states to 11452 states and 46463 transitions. [2022-11-18 19:46:38,819 INFO L78 Accepts]: Start accepts. Automaton has 11452 states and 46463 transitions. Word has length 25 [2022-11-18 19:46:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:46:38,820 INFO L495 AbstractCegarLoop]: Abstraction has 11452 states and 46463 transitions. [2022-11-18 19:46:38,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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 19:46:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 11452 states and 46463 transitions. [2022-11-18 19:46:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 19:46:38,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:46:38,855 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:46:38,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:46:39,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 19:46:39,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 19:46:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash -367508206, now seen corresponding path program 12 times [2022-11-18 19:46:39,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:46:39,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257839612] [2022-11-18 19:46:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:46:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:46:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257839612] [2022-11-18 19:46:39,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257839612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:46:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866488389] [2022-11-18 19:46:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:46:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:46:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:46:39,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:46:39,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95ff6d5a-1779-4bf2-975f-4ac80dae4e54/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 19:46:39,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-18 19:46:39,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 19:46:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:40,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:41,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866488389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:41,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:46:41,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-18 19:46:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259732449] [2022-11-18 19:46:41,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 19:46:41,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:46:41,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 19:46:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=2566, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 19:46:41,889 INFO L87 Difference]: Start difference. First operand 11452 states and 46463 transitions. Second operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 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)