./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 5e519f3a 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_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- 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-5e519f3 [2022-11-02 20:41:43,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:41:43,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:41:43,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:41:43,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:41:43,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:41:43,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:41:43,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:41:43,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:41:43,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:41:43,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:41:44,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:41:44,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:41:44,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:41:44,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:41:44,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:41:44,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:41:44,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:41:44,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:41:44,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:41:44,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:41:44,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:41:44,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:41:44,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:41:44,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:41:44,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:41:44,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:41:44,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:41:44,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:41:44,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:41:44,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:41:44,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:41:44,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:41:44,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:41:44,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:41:44,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:41:44,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:41:44,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:41:44,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:41:44,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:41:44,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:41:44,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-02 20:41:44,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:41:44,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:41:44,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:41:44,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:41:44,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:41:44,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:41:44,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:41:44,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:41:44,105 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:41:44,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:41:44,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:41:44,107 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:41:44,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:41:44,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:41:44,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:41:44,108 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:41:44,108 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:41:44,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:41:44,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:41:44,109 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:41:44,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:41:44,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:41:44,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:41:44,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:41:44,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:41:44,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:41:44,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:41:44,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:41:44,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:41:44,113 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_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2022-11-02 20:41:44,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:41:44,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:41:44,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:41:44,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:41:44,534 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:41:44,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-02 20:41:44,612 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/45fef61d4/2fefec0f954f42eca22e038539501377/FLAGfc8a21e12 [2022-11-02 20:41:45,349 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:41:45,350 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-02 20:41:45,387 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/45fef61d4/2fefec0f954f42eca22e038539501377/FLAGfc8a21e12 [2022-11-02 20:41:45,620 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/45fef61d4/2fefec0f954f42eca22e038539501377 [2022-11-02 20:41:45,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:41:45,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:41:45,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:41:45,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:41:45,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:41:45,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:41:45" (1/1) ... [2022-11-02 20:41:45,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e672d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:45, skipping insertion in model container [2022-11-02 20:41:45,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:41:45" (1/1) ... [2022-11-02 20:41:45,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:41:45,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:41:46,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:41:46,175 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:41:46,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:41:46,280 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:41:46,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46 WrapperNode [2022-11-02 20:41:46,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:41:46,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:41:46,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:41:46,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:41:46,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,351 INFO L138 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2022-11-02 20:41:46,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:41:46,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:41:46,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:41:46,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:41:46,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:41:46,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:41:46,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:41:46,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:41:46,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (1/1) ... [2022-11-02 20:41:46,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:41:46,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:46,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:41:46,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:41:46,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:41:46,484 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-02 20:41:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-02 20:41:46,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:41:46,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:41:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:41:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:41:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:41:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:41:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:41:46,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:41:46,662 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:41:46,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:41:46,953 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:41:46,976 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:41:46,977 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:41:46,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:46 BoogieIcfgContainer [2022-11-02 20:41:46,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:41:46,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:41:46,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:41:46,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:41:46,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:41:45" (1/3) ... [2022-11-02 20:41:46,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4361b63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:46, skipping insertion in model container [2022-11-02 20:41:47,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:41:46" (2/3) ... [2022-11-02 20:41:47,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4361b63f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:47, skipping insertion in model container [2022-11-02 20:41:47,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:46" (3/3) ... [2022-11-02 20:41:47,002 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2022-11-02 20:41:47,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:41:47,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-11-02 20:41:47,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:41:47,112 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;@74247f21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:41:47,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-02 20:41:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:41:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:41:47,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:47,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:41:47,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2022-11-02 20:41:47,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:47,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006307749] [2022-11-02 20:41:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:47,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:47,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:47,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006307749] [2022-11-02 20:41:47,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006307749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:47,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:47,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:41:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145909864] [2022-11-02 20:41:47,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:47,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:41:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:47,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:41:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:41:47,725 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:48,007 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2022-11-02 20:41:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:41:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:41:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:48,023 INFO L225 Difference]: With dead ends: 134 [2022-11-02 20:41:48,023 INFO L226 Difference]: Without dead ends: 128 [2022-11-02 20:41:48,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:41:48,029 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:48,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 130 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-02 20:41:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2022-11-02 20:41:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.646153846153846) internal successors, (107), 85 states have internal predecessors, (107), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-02 20:41:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2022-11-02 20:41:48,087 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 6 [2022-11-02 20:41:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:48,088 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2022-11-02 20:41:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2022-11-02 20:41:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:41:48,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:48,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:41:48,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:41:48,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2022-11-02 20:41:48,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:48,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59715] [2022-11-02 20:41:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:48,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59715] [2022-11-02 20:41:48,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:48,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:48,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089486539] [2022-11-02 20:41:48,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:48,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:41:48,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:41:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:48,321 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:48,499 INFO L93 Difference]: Finished difference Result 222 states and 302 transitions. [2022-11-02 20:41:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:41:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:41:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:48,503 INFO L225 Difference]: With dead ends: 222 [2022-11-02 20:41:48,503 INFO L226 Difference]: Without dead ends: 222 [2022-11-02 20:41:48,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:48,505 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 138 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:48,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 212 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-02 20:41:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2022-11-02 20:41:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.6641221374045803) internal successors, (218), 151 states have internal predecessors, (218), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-02 20:41:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2022-11-02 20:41:48,531 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 6 [2022-11-02 20:41:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:48,531 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2022-11-02 20:41:48,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2022-11-02 20:41:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:41:48,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:48,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:48,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:41:48,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:48,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2022-11-02 20:41:48,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:48,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946198394] [2022-11-02 20:41:48,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:48,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:48,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:48,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946198394] [2022-11-02 20:41:48,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946198394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:48,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:48,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200948047] [2022-11-02 20:41:48,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:41:48,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:41:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:48,879 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:49,124 INFO L93 Difference]: Finished difference Result 260 states and 371 transitions. [2022-11-02 20:41:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:41:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:41:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:49,128 INFO L225 Difference]: With dead ends: 260 [2022-11-02 20:41:49,128 INFO L226 Difference]: Without dead ends: 260 [2022-11-02 20:41:49,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:49,130 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 189 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-02 20:41:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2022-11-02 20:41:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 154 states have internal predecessors, (221), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-02 20:41:49,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 266 transitions. [2022-11-02 20:41:49,153 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 266 transitions. Word has length 7 [2022-11-02 20:41:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:49,153 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 266 transitions. [2022-11-02 20:41:49,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 266 transitions. [2022-11-02 20:41:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:41:49,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:49,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:49,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:41:49,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2022-11-02 20:41:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502860631] [2022-11-02 20:41:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:49,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:49,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:49,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502860631] [2022-11-02 20:41:49,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502860631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:49,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:49,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320011092] [2022-11-02 20:41:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:41:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:41:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:49,489 INFO L87 Difference]: Start difference. First operand 172 states and 266 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:49,687 INFO L93 Difference]: Finished difference Result 224 states and 303 transitions. [2022-11-02 20:41:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:41:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:41:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:49,690 INFO L225 Difference]: With dead ends: 224 [2022-11-02 20:41:49,691 INFO L226 Difference]: Without dead ends: 224 [2022-11-02 20:41:49,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:49,693 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:49,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 208 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:49,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-02 20:41:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 172. [2022-11-02 20:41:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6343283582089552) internal successors, (219), 154 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-02 20:41:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 264 transitions. [2022-11-02 20:41:49,709 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 264 transitions. Word has length 8 [2022-11-02 20:41:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:49,710 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 264 transitions. [2022-11-02 20:41:49,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 264 transitions. [2022-11-02 20:41:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:41:49,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:49,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:49,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:41:49,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2022-11-02 20:41:49,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:49,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772403027] [2022-11-02 20:41:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:49,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:49,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:49,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772403027] [2022-11-02 20:41:49,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772403027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:49,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:49,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959383037] [2022-11-02 20:41:49,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:49,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:41:49,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:49,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:41:49,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:49,834 INFO L87 Difference]: Start difference. First operand 172 states and 264 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:49,997 INFO L93 Difference]: Finished difference Result 266 states and 366 transitions. [2022-11-02 20:41:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:41:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 20:41:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:50,000 INFO L225 Difference]: With dead ends: 266 [2022-11-02 20:41:50,001 INFO L226 Difference]: Without dead ends: 266 [2022-11-02 20:41:50,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:50,002 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:50,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-02 20:41:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2022-11-02 20:41:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 165 states have (on average 1.606060606060606) internal successors, (265), 186 states have internal predecessors, (265), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-02 20:41:50,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 310 transitions. [2022-11-02 20:41:50,019 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 310 transitions. Word has length 9 [2022-11-02 20:41:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:50,020 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 310 transitions. [2022-11-02 20:41:50,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 310 transitions. [2022-11-02 20:41:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:41:50,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:50,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:50,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:41:50,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2022-11-02 20:41:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:50,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61988735] [2022-11-02 20:41:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:50,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:50,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61988735] [2022-11-02 20:41:50,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61988735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:50,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:50,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:50,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457970631] [2022-11-02 20:41:50,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:50,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:41:50,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:41:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:41:50,143 INFO L87 Difference]: Start difference. First operand 205 states and 310 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:50,267 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2022-11-02 20:41:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:41:50,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 20:41:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:50,270 INFO L225 Difference]: With dead ends: 253 [2022-11-02 20:41:50,270 INFO L226 Difference]: Without dead ends: 253 [2022-11-02 20:41:50,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:41:50,272 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 139 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:50,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 235 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-02 20:41:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 219. [2022-11-02 20:41:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 200 states have internal predecessors, (286), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-02 20:41:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 331 transitions. [2022-11-02 20:41:50,287 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 331 transitions. Word has length 10 [2022-11-02 20:41:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:50,288 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 331 transitions. [2022-11-02 20:41:50,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 331 transitions. [2022-11-02 20:41:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:41:50,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:50,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:50,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:41:50,290 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:50,291 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2022-11-02 20:41:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292568405] [2022-11-02 20:41:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:50,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292568405] [2022-11-02 20:41:50,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292568405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304888384] [2022-11-02 20:41:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:50,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:50,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:50,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:50,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:41:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:41:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:50,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:51,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304888384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:51,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:51,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-02 20:41:51,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324506162] [2022-11-02 20:41:51,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:51,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:41:51,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:41:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:41:51,099 INFO L87 Difference]: Start difference. First operand 219 states and 331 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:51,467 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2022-11-02 20:41:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:41:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:41:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:51,470 INFO L225 Difference]: With dead ends: 291 [2022-11-02 20:41:51,471 INFO L226 Difference]: Without dead ends: 291 [2022-11-02 20:41:51,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:41:51,472 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 469 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:51,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 489 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-02 20:41:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2022-11-02 20:41:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 183 states have (on average 1.540983606557377) internal successors, (282), 206 states have internal predecessors, (282), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-02 20:41:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2022-11-02 20:41:51,496 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 14 [2022-11-02 20:41:51,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:51,496 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2022-11-02 20:41:51,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2022-11-02 20:41:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:41:51,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:51,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:51,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:51,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:51,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:51,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:51,715 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2022-11-02 20:41:51,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865524743] [2022-11-02 20:41:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:51,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:51,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:51,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865524743] [2022-11-02 20:41:51,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865524743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915997527] [2022-11-02 20:41:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:51,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:51,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:51,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:41:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:41:52,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:52,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:41:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:52,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:52,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915997527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:52,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:52,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-02 20:41:52,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910421079] [2022-11-02 20:41:52,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:41:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:41:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:41:52,374 INFO L87 Difference]: Start difference. First operand 225 states and 332 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:52,769 INFO L93 Difference]: Finished difference Result 336 states and 471 transitions. [2022-11-02 20:41:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:41:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:41:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:52,777 INFO L225 Difference]: With dead ends: 336 [2022-11-02 20:41:52,777 INFO L226 Difference]: Without dead ends: 336 [2022-11-02 20:41:52,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:41:52,779 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 428 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:52,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 317 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:41:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-02 20:41:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 239. [2022-11-02 20:41:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 220 states have internal predecessors, (296), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2022-11-02 20:41:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2022-11-02 20:41:52,804 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 15 [2022-11-02 20:41:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:52,805 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2022-11-02 20:41:52,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2022-11-02 20:41:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:41:52,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:52,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:52,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 20:41:53,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:53,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:53,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2022-11-02 20:41:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:53,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565256590] [2022-11-02 20:41:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:53,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565256590] [2022-11-02 20:41:53,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565256590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:53,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944670272] [2022-11-02 20:41:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:53,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:53,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:53,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:53,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:41:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:41:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:53,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:41:53,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:41:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:53,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:53,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944670272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:53,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:53,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-11-02 20:41:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461287088] [2022-11-02 20:41:53,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:53,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:41:53,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:41:53,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:41:53,938 INFO L87 Difference]: Start difference. First operand 239 states and 353 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:54,981 INFO L93 Difference]: Finished difference Result 550 states and 739 transitions. [2022-11-02 20:41:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:41:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:41:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:54,985 INFO L225 Difference]: With dead ends: 550 [2022-11-02 20:41:54,986 INFO L226 Difference]: Without dead ends: 550 [2022-11-02 20:41:54,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:41:54,987 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 433 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:54,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1026 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:41:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-02 20:41:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2022-11-02 20:41:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 289 states have (on average 1.5536332179930796) internal successors, (449), 320 states have internal predecessors, (449), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2022-11-02 20:41:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2022-11-02 20:41:55,036 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 16 [2022-11-02 20:41:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:55,036 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2022-11-02 20:41:55,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,037 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2022-11-02 20:41:55,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:41:55,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:55,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:55,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:41:55,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:55,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2022-11-02 20:41:55,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:55,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045014366] [2022-11-02 20:41:55,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:55,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:55,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:55,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045014366] [2022-11-02 20:41:55,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045014366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:55,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:55,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:41:55,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489264510] [2022-11-02 20:41:55,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:55,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:55,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:55,308 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:55,362 INFO L93 Difference]: Finished difference Result 495 states and 752 transitions. [2022-11-02 20:41:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:41:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:55,366 INFO L225 Difference]: With dead ends: 495 [2022-11-02 20:41:55,366 INFO L226 Difference]: Without dead ends: 495 [2022-11-02 20:41:55,366 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 [2022-11-02 20:41:55,367 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:55,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:55,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-02 20:41:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 479. [2022-11-02 20:41:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 409 states have (on average 1.5574572127139363) internal successors, (637), 445 states have internal predecessors, (637), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2022-11-02 20:41:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 747 transitions. [2022-11-02 20:41:55,401 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 747 transitions. Word has length 18 [2022-11-02 20:41:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:55,402 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 747 transitions. [2022-11-02 20:41:55,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 747 transitions. [2022-11-02 20:41:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:41:55,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:55,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:55,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:41:55,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:55,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2022-11-02 20:41:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:55,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655743794] [2022-11-02 20:41:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:55,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:55,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:55,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655743794] [2022-11-02 20:41:55,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655743794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:55,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:55,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:41:55,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110749066] [2022-11-02 20:41:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:55,459 INFO L87 Difference]: Start difference. First operand 479 states and 747 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:55,469 INFO L93 Difference]: Finished difference Result 441 states and 681 transitions. [2022-11-02 20:41:55,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:55,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:41:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:55,475 INFO L225 Difference]: With dead ends: 441 [2022-11-02 20:41:55,475 INFO L226 Difference]: Without dead ends: 441 [2022-11-02 20:41:55,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:55,476 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:55,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-02 20:41:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2022-11-02 20:41:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 377 states have (on average 1.5145888594164456) internal successors, (571), 407 states have internal predecessors, (571), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2022-11-02 20:41:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 681 transitions. [2022-11-02 20:41:55,502 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 681 transitions. Word has length 18 [2022-11-02 20:41:55,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:55,503 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 681 transitions. [2022-11-02 20:41:55,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 681 transitions. [2022-11-02 20:41:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:41:55,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:55,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:55,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:41:55,506 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2022-11-02 20:41:55,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:55,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116825101] [2022-11-02 20:41:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:55,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:55,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116825101] [2022-11-02 20:41:55,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116825101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:55,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:55,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:41:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876012687] [2022-11-02 20:41:55,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:41:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:41:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:41:55,610 INFO L87 Difference]: Start difference. First operand 441 states and 681 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:55,659 INFO L93 Difference]: Finished difference Result 509 states and 761 transitions. [2022-11-02 20:41:55,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:41:55,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-02 20:41:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:55,665 INFO L225 Difference]: With dead ends: 509 [2022-11-02 20:41:55,666 INFO L226 Difference]: Without dead ends: 509 [2022-11-02 20:41:55,666 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 [2022-11-02 20:41:55,667 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:55,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:41:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-02 20:41:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 491. [2022-11-02 20:41:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 424 states have (on average 1.5047169811320755) internal successors, (638), 455 states have internal predecessors, (638), 20 states have call successors, (20), 15 states have call predecessors, (20), 32 states have return successors, (94), 20 states have call predecessors, (94), 20 states have call successors, (94) [2022-11-02 20:41:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 752 transitions. [2022-11-02 20:41:55,696 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 752 transitions. Word has length 19 [2022-11-02 20:41:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:55,697 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 752 transitions. [2022-11-02 20:41:55,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:41:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 752 transitions. [2022-11-02 20:41:55,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:41:55,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:55,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:55,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:41:55,706 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2022-11-02 20:41:55,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:55,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221993683] [2022-11-02 20:41:55,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:55,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221993683] [2022-11-02 20:41:55,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221993683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:41:55,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:41:55,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:41:55,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791199667] [2022-11-02 20:41:55,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:41:55,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:41:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:55,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:41:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:41:55,820 INFO L87 Difference]: Start difference. First operand 491 states and 752 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:41:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:55,918 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2022-11-02 20:41:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:41:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-02 20:41:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:55,924 INFO L225 Difference]: With dead ends: 351 [2022-11-02 20:41:55,924 INFO L226 Difference]: Without dead ends: 351 [2022-11-02 20:41:55,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:41:55,925 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:55,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-02 20:41:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-11-02 20:41:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 299 states have (on average 1.4782608695652173) internal successors, (442), 324 states have internal predecessors, (442), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2022-11-02 20:41:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 521 transitions. [2022-11-02 20:41:55,941 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 521 transitions. Word has length 25 [2022-11-02 20:41:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:55,941 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 521 transitions. [2022-11-02 20:41:55,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:41:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 521 transitions. [2022-11-02 20:41:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:41:55,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:55,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:41:55,943 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:41:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2022-11-02 20:41:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:55,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830887829] [2022-11-02 20:41:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:56,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:41:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:56,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:56,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830887829] [2022-11-02 20:41:56,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830887829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059466399] [2022-11-02 20:41:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:56,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:56,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:56,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:56,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:41:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:41:56,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:56,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:41:56,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:41:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:56,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:59,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059466399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:59,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:41:59,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-11-02 20:41:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310770038] [2022-11-02 20:41:59,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:59,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:41:59,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:41:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:41:59,213 INFO L87 Difference]: Start difference. First operand 351 states and 521 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:00,379 INFO L93 Difference]: Finished difference Result 531 states and 739 transitions. [2022-11-02 20:42:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:42:00,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-02 20:42:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:00,384 INFO L225 Difference]: With dead ends: 531 [2022-11-02 20:42:00,384 INFO L226 Difference]: Without dead ends: 531 [2022-11-02 20:42:00,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:42:00,385 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 498 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:00,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 376 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-11-02 20:42:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-02 20:42:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 452. [2022-11-02 20:42:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 391 states have (on average 1.4757033248081841) internal successors, (577), 420 states have internal predecessors, (577), 17 states have call successors, (17), 14 states have call predecessors, (17), 29 states have return successors, (72), 17 states have call predecessors, (72), 17 states have call successors, (72) [2022-11-02 20:42:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 666 transitions. [2022-11-02 20:42:00,410 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 666 transitions. Word has length 27 [2022-11-02 20:42:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:00,411 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 666 transitions. [2022-11-02 20:42:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 666 transitions. [2022-11-02 20:42:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:42:00,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:00,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:00,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:00,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:42:00,638 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:00,639 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2022-11-02 20:42:00,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:00,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220439147] [2022-11-02 20:42:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:00,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:00,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:00,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220439147] [2022-11-02 20:42:00,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220439147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:00,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100146352] [2022-11-02 20:42:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:00,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:00,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:42:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:00,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:42:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:01,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100146352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:01,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:42:01,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-11-02 20:42:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451425013] [2022-11-02 20:42:01,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:42:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:01,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:42:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:42:01,191 INFO L87 Difference]: Start difference. First operand 452 states and 666 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:01,369 INFO L93 Difference]: Finished difference Result 566 states and 816 transitions. [2022-11-02 20:42:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:42:01,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-02 20:42:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:01,373 INFO L225 Difference]: With dead ends: 566 [2022-11-02 20:42:01,373 INFO L226 Difference]: Without dead ends: 566 [2022-11-02 20:42:01,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:42:01,374 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 115 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:01,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 164 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-02 20:42:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 473. [2022-11-02 20:42:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 416 states have (on average 1.4615384615384615) internal successors, (608), 441 states have internal predecessors, (608), 17 states have call successors, (17), 14 states have call predecessors, (17), 25 states have return successors, (68), 17 states have call predecessors, (68), 17 states have call successors, (68) [2022-11-02 20:42:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 693 transitions. [2022-11-02 20:42:01,401 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 693 transitions. Word has length 28 [2022-11-02 20:42:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:01,402 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 693 transitions. [2022-11-02 20:42:01,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 693 transitions. [2022-11-02 20:42:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:42:01,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:01,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:01,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:01,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:01,623 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:01,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2022-11-02 20:42:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:01,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882922932] [2022-11-02 20:42:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:02,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882922932] [2022-11-02 20:42:02,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882922932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:02,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384422335] [2022-11-02 20:42:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:02,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:02,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:42:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:02,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:42:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:03,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:03,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:42:03,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:42:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:03,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:03,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384422335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:03,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:03,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-02 20:42:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321070643] [2022-11-02 20:42:03,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:42:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:42:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:42:03,512 INFO L87 Difference]: Start difference. First operand 473 states and 693 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:06,553 INFO L93 Difference]: Finished difference Result 870 states and 1163 transitions. [2022-11-02 20:42:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:42:06,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-02 20:42:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:06,558 INFO L225 Difference]: With dead ends: 870 [2022-11-02 20:42:06,558 INFO L226 Difference]: Without dead ends: 870 [2022-11-02 20:42:06,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=534, Invalid=2118, Unknown=0, NotChecked=0, Total=2652 [2022-11-02 20:42:06,560 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 894 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:06,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 320 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 646 Invalid, 0 Unknown, 157 Unchecked, 1.0s Time] [2022-11-02 20:42:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-02 20:42:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 637. [2022-11-02 20:42:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 570 states have (on average 1.46140350877193) internal successors, (833), 596 states have internal predecessors, (833), 21 states have call successors, (21), 19 states have call predecessors, (21), 31 states have return successors, (80), 21 states have call predecessors, (80), 21 states have call successors, (80) [2022-11-02 20:42:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 934 transitions. [2022-11-02 20:42:06,585 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 934 transitions. Word has length 29 [2022-11-02 20:42:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:06,586 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 934 transitions. [2022-11-02 20:42:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 934 transitions. [2022-11-02 20:42:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:42:06,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:06,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:06,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:06,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:42:06,804 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:06,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1182683565, now seen corresponding path program 1 times [2022-11-02 20:42:06,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:06,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013192086] [2022-11-02 20:42:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:06,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:06,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:06,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:06,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013192086] [2022-11-02 20:42:06,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013192086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:06,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:06,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:06,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653803710] [2022-11-02 20:42:06,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:06,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:06,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:06,999 INFO L87 Difference]: Start difference. First operand 637 states and 934 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:07,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:07,302 INFO L93 Difference]: Finished difference Result 585 states and 816 transitions. [2022-11-02 20:42:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:42:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-02 20:42:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:07,307 INFO L225 Difference]: With dead ends: 585 [2022-11-02 20:42:07,307 INFO L226 Difference]: Without dead ends: 585 [2022-11-02 20:42:07,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:07,309 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 145 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:07,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 144 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-02 20:42:07,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 560. [2022-11-02 20:42:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 503 states have (on average 1.4532803180914513) internal successors, (731), 531 states have internal predecessors, (731), 15 states have call successors, (15), 13 states have call predecessors, (15), 27 states have return successors, (50), 15 states have call predecessors, (50), 15 states have call successors, (50) [2022-11-02 20:42:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 796 transitions. [2022-11-02 20:42:07,337 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 796 transitions. Word has length 30 [2022-11-02 20:42:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:07,338 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 796 transitions. [2022-11-02 20:42:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 796 transitions. [2022-11-02 20:42:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:42:07,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:07,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:42:07,340 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2022-11-02 20:42:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:07,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522184878] [2022-11-02 20:42:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:07,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:07,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:07,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:07,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522184878] [2022-11-02 20:42:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522184878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474568931] [2022-11-02 20:42:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:07,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:07,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:07,701 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:07,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:42:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:42:07,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:07,913 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:07,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:42:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:07,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:08,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474568931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:08,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:08,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2022-11-02 20:42:08,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251060139] [2022-11-02 20:42:08,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:08,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:42:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:42:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:08,055 INFO L87 Difference]: Start difference. First operand 560 states and 796 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:08,594 INFO L93 Difference]: Finished difference Result 679 states and 905 transitions. [2022-11-02 20:42:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:42:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-02 20:42:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:08,598 INFO L225 Difference]: With dead ends: 679 [2022-11-02 20:42:08,598 INFO L226 Difference]: Without dead ends: 679 [2022-11-02 20:42:08,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:42:08,599 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 239 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:08,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 302 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-02 20:42:08,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-11-02 20:42:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 611. [2022-11-02 20:42:08,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 552 states have (on average 1.4257246376811594) internal successors, (787), 580 states have internal predecessors, (787), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (50), 15 states have call predecessors, (50), 15 states have call successors, (50) [2022-11-02 20:42:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 852 transitions. [2022-11-02 20:42:08,624 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 852 transitions. Word has length 30 [2022-11-02 20:42:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:08,626 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 852 transitions. [2022-11-02 20:42:08,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 852 transitions. [2022-11-02 20:42:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:42:08,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:08,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:08,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:42:08,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:08,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2022-11-02 20:42:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:08,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808797015] [2022-11-02 20:42:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:09,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:09,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808797015] [2022-11-02 20:42:09,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808797015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:09,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627609219] [2022-11-02 20:42:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:09,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:09,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:09,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:42:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:09,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:42:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:09,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:09,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:09,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:09,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627609219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:09,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:09,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2022-11-02 20:42:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36961180] [2022-11-02 20:42:09,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:42:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:42:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:42:09,848 INFO L87 Difference]: Start difference. First operand 611 states and 852 transitions. Second operand has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:10,715 INFO L93 Difference]: Finished difference Result 725 states and 940 transitions. [2022-11-02 20:42:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:42:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-02 20:42:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:10,719 INFO L225 Difference]: With dead ends: 725 [2022-11-02 20:42:10,719 INFO L226 Difference]: Without dead ends: 725 [2022-11-02 20:42:10,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:42:10,721 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 330 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:10,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 277 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 422 Invalid, 0 Unknown, 103 Unchecked, 0.5s Time] [2022-11-02 20:42:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-02 20:42:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 654. [2022-11-02 20:42:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 593 states have (on average 1.4131534569983137) internal successors, (838), 623 states have internal predecessors, (838), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2022-11-02 20:42:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 902 transitions. [2022-11-02 20:42:10,753 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 902 transitions. Word has length 31 [2022-11-02 20:42:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:10,753 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 902 transitions. [2022-11-02 20:42:10,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 902 transitions. [2022-11-02 20:42:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:42:10,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:10,755 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:10,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:10,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:10,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2022-11-02 20:42:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747088445] [2022-11-02 20:42:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:11,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747088445] [2022-11-02 20:42:11,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747088445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:11,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819667809] [2022-11-02 20:42:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:11,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:11,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:11,516 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:11,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:42:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:42:11,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:12,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:12,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:12,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819667809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:12,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:12,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-11-02 20:42:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618616888] [2022-11-02 20:42:12,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:42:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:42:12,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:42:12,552 INFO L87 Difference]: Start difference. First operand 654 states and 902 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:13,918 INFO L93 Difference]: Finished difference Result 699 states and 917 transitions. [2022-11-02 20:42:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:42:13,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-02 20:42:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:13,922 INFO L225 Difference]: With dead ends: 699 [2022-11-02 20:42:13,922 INFO L226 Difference]: Without dead ends: 699 [2022-11-02 20:42:13,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:42:13,924 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:13,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 327 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 559 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2022-11-02 20:42:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-11-02 20:42:13,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 654. [2022-11-02 20:42:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 593 states have (on average 1.391231028667791) internal successors, (825), 623 states have internal predecessors, (825), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2022-11-02 20:42:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 889 transitions. [2022-11-02 20:42:13,951 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 889 transitions. Word has length 35 [2022-11-02 20:42:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:13,952 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 889 transitions. [2022-11-02 20:42:13,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 889 transitions. [2022-11-02 20:42:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:42:13,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:13,953 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:13,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:14,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:14,166 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:14,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2022-11-02 20:42:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001944409] [2022-11-02 20:42:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:14,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:42:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:14,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001944409] [2022-11-02 20:42:14,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001944409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:14,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70888795] [2022-11-02 20:42:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:14,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:14,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:42:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:42:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:14,763 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:42:14,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:42:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:42:14,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:14,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-02 20:42:15,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-02 20:42:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:42:15,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70888795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:15,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:15,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2022-11-02 20:42:15,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184971209] [2022-11-02 20:42:15,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:42:15,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:15,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:42:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:42:15,176 INFO L87 Difference]: Start difference. First operand 654 states and 889 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:42:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:15,884 INFO L93 Difference]: Finished difference Result 725 states and 946 transitions. [2022-11-02 20:42:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:42:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-11-02 20:42:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:15,888 INFO L225 Difference]: With dead ends: 725 [2022-11-02 20:42:15,888 INFO L226 Difference]: Without dead ends: 725 [2022-11-02 20:42:15,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:42:15,889 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 530 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:15,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 155 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 307 Invalid, 0 Unknown, 5 Unchecked, 0.3s Time] [2022-11-02 20:42:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-11-02 20:42:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 661. [2022-11-02 20:42:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 602 states have (on average 1.3903654485049834) internal successors, (837), 630 states have internal predecessors, (837), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-11-02 20:42:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 897 transitions. [2022-11-02 20:42:15,907 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 897 transitions. Word has length 36 [2022-11-02 20:42:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:15,907 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 897 transitions. [2022-11-02 20:42:15,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:42:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 897 transitions. [2022-11-02 20:42:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:42:15,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:15,909 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:15,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:16,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:16,134 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:16,135 INFO L85 PathProgramCache]: Analyzing trace with hash 45027747, now seen corresponding path program 1 times [2022-11-02 20:42:16,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614489907] [2022-11-02 20:42:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:16,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:16,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:16,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:16,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614489907] [2022-11-02 20:42:16,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614489907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:16,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:16,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:42:16,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91812241] [2022-11-02 20:42:16,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:16,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:42:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:42:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:42:16,717 INFO L87 Difference]: Start difference. First operand 661 states and 897 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:17,338 INFO L93 Difference]: Finished difference Result 511 states and 658 transitions. [2022-11-02 20:42:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:42:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-02 20:42:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:17,345 INFO L225 Difference]: With dead ends: 511 [2022-11-02 20:42:17,345 INFO L226 Difference]: Without dead ends: 511 [2022-11-02 20:42:17,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:42:17,346 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 199 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:17,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 232 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:42:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-02 20:42:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 429. [2022-11-02 20:42:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 386 states have (on average 1.38860103626943) internal successors, (536), 408 states have internal predecessors, (536), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-02 20:42:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 573 transitions. [2022-11-02 20:42:17,362 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 573 transitions. Word has length 37 [2022-11-02 20:42:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:17,363 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 573 transitions. [2022-11-02 20:42:17,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 573 transitions. [2022-11-02 20:42:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:42:17,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:17,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:17,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:42:17,365 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:17,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:17,365 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2022-11-02 20:42:17,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:17,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884766842] [2022-11-02 20:42:17,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:17,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:17,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884766842] [2022-11-02 20:42:17,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884766842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:17,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296630585] [2022-11-02 20:42:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:17,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:17,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:17,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:42:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:42:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:17,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:17,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296630585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:17,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:17,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-02 20:42:17,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467233745] [2022-11-02 20:42:17,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:42:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:42:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:42:17,742 INFO L87 Difference]: Start difference. First operand 429 states and 573 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:17,857 INFO L93 Difference]: Finished difference Result 448 states and 586 transitions. [2022-11-02 20:42:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:42:17,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-02 20:42:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:17,860 INFO L225 Difference]: With dead ends: 448 [2022-11-02 20:42:17,860 INFO L226 Difference]: Without dead ends: 448 [2022-11-02 20:42:17,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:17,861 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:17,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:17,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-02 20:42:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 426. [2022-11-02 20:42:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 385 states have (on average 1.3688311688311687) internal successors, (527), 405 states have internal predecessors, (527), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-02 20:42:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 564 transitions. [2022-11-02 20:42:17,873 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 564 transitions. Word has length 40 [2022-11-02 20:42:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:17,874 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 564 transitions. [2022-11-02 20:42:17,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 564 transitions. [2022-11-02 20:42:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:42:17,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:17,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:17,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:18,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:42:18,094 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2022-11-02 20:42:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490011248] [2022-11-02 20:42:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:18,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:18,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490011248] [2022-11-02 20:42:18,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490011248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797170627] [2022-11-02 20:42:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:18,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:18,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:18,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:42:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:42:18,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:18,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:18,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797170627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:18,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:18,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-02 20:42:18,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416536633] [2022-11-02 20:42:18,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:18,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:42:18,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:18,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:42:18,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:42:18,494 INFO L87 Difference]: Start difference. First operand 426 states and 564 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:18,632 INFO L93 Difference]: Finished difference Result 445 states and 576 transitions. [2022-11-02 20:42:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:42:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-11-02 20:42:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:18,635 INFO L225 Difference]: With dead ends: 445 [2022-11-02 20:42:18,636 INFO L226 Difference]: Without dead ends: 445 [2022-11-02 20:42:18,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:18,637 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:18,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-02 20:42:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 424. [2022-11-02 20:42:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 385 states have (on average 1.3454545454545455) internal successors, (518), 403 states have internal predecessors, (518), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-02 20:42:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 555 transitions. [2022-11-02 20:42:18,651 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 555 transitions. Word has length 41 [2022-11-02 20:42:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:18,652 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 555 transitions. [2022-11-02 20:42:18,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 555 transitions. [2022-11-02 20:42:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:42:18,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:18,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:18,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:18,870 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2022-11-02 20:42:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:18,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151360066] [2022-11-02 20:42:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:19,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:19,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151360066] [2022-11-02 20:42:19,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151360066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:19,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687528002] [2022-11-02 20:42:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:19,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:19,092 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:19,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:42:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:19,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:42:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:19,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:42:19,293 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:19,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:42:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:19,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:19,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687528002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:19,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:19,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-11-02 20:42:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597704794] [2022-11-02 20:42:19,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:19,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:19,529 INFO L87 Difference]: Start difference. First operand 424 states and 555 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:19,702 INFO L93 Difference]: Finished difference Result 458 states and 589 transitions. [2022-11-02 20:42:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:42:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-02 20:42:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:19,705 INFO L225 Difference]: With dead ends: 458 [2022-11-02 20:42:19,705 INFO L226 Difference]: Without dead ends: 458 [2022-11-02 20:42:19,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:42:19,706 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:19,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 110 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-11-02 20:42:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-02 20:42:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 434. [2022-11-02 20:42:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 395 states have (on average 1.339240506329114) internal successors, (529), 413 states have internal predecessors, (529), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-02 20:42:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 566 transitions. [2022-11-02 20:42:19,718 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 566 transitions. Word has length 42 [2022-11-02 20:42:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:19,719 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 566 transitions. [2022-11-02 20:42:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:19,719 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 566 transitions. [2022-11-02 20:42:19,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:42:19,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:19,721 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:19,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:19,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:42:19,934 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1366889029, now seen corresponding path program 1 times [2022-11-02 20:42:19,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:19,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327487642] [2022-11-02 20:42:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:19,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:20,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327487642] [2022-11-02 20:42:20,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327487642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069489300] [2022-11-02 20:42:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:20,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:20,031 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:20,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:42:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:42:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:20,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:20,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069489300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:20,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:42:20,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-02 20:42:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359127499] [2022-11-02 20:42:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:20,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:42:20,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:20,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:42:20,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:20,193 INFO L87 Difference]: Start difference. First operand 434 states and 566 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:20,241 INFO L93 Difference]: Finished difference Result 490 states and 612 transitions. [2022-11-02 20:42:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:42:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-02 20:42:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:20,245 INFO L225 Difference]: With dead ends: 490 [2022-11-02 20:42:20,245 INFO L226 Difference]: Without dead ends: 490 [2022-11-02 20:42:20,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:20,246 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 68 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:20,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 165 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:42:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-02 20:42:20,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 424. [2022-11-02 20:42:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 385 states have (on average 1.309090909090909) internal successors, (504), 403 states have internal predecessors, (504), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-02 20:42:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 541 transitions. [2022-11-02 20:42:20,264 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 541 transitions. Word has length 45 [2022-11-02 20:42:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:20,265 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 541 transitions. [2022-11-02 20:42:20,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:42:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 541 transitions. [2022-11-02 20:42:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:42:20,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:20,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:20,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:20,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:42:20,483 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:20,483 INFO L85 PathProgramCache]: Analyzing trace with hash -624108164, now seen corresponding path program 1 times [2022-11-02 20:42:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:20,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319823658] [2022-11-02 20:42:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:20,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:20,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319823658] [2022-11-02 20:42:20,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319823658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977437255] [2022-11-02 20:42:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:20,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:20,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:20,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:20,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:42:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:42:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:20,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:21,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977437255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:21,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:21,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-11-02 20:42:21,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166491110] [2022-11-02 20:42:21,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:21,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:42:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:42:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:42:21,111 INFO L87 Difference]: Start difference. First operand 424 states and 541 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:42:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:21,506 INFO L93 Difference]: Finished difference Result 343 states and 411 transitions. [2022-11-02 20:42:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:42:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-11-02 20:42:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:21,509 INFO L225 Difference]: With dead ends: 343 [2022-11-02 20:42:21,509 INFO L226 Difference]: Without dead ends: 343 [2022-11-02 20:42:21,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:42:21,510 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 191 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:21,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 140 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:42:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-02 20:42:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 316. [2022-11-02 20:42:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 284 states have (on average 1.2711267605633803) internal successors, (361), 299 states have internal predecessors, (361), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-02 20:42:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 386 transitions. [2022-11-02 20:42:21,521 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 386 transitions. Word has length 48 [2022-11-02 20:42:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:21,521 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 386 transitions. [2022-11-02 20:42:21,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:42:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 386 transitions. [2022-11-02 20:42:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:42:21,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:21,525 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:21,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:42:21,750 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2022-11-02 20:42:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:21,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120677155] [2022-11-02 20:42:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:22,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:42:22,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:22,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120677155] [2022-11-02 20:42:22,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120677155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111582062] [2022-11-02 20:42:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:22,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:22,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:22,185 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:22,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:42:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:42:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:22,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:22,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:23,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111582062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:23,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:23,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-11-02 20:42:23,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615060596] [2022-11-02 20:42:23,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:23,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:42:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:23,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:42:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:42:23,110 INFO L87 Difference]: Start difference. First operand 316 states and 386 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:42:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:23,834 INFO L93 Difference]: Finished difference Result 354 states and 410 transitions. [2022-11-02 20:42:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:42:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-02 20:42:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:23,837 INFO L225 Difference]: With dead ends: 354 [2022-11-02 20:42:23,837 INFO L226 Difference]: Without dead ends: 354 [2022-11-02 20:42:23,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:42:23,838 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 307 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:23,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 238 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 289 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-11-02 20:42:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-02 20:42:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 323. [2022-11-02 20:42:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2602739726027397) internal successors, (368), 306 states have internal predecessors, (368), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 391 transitions. [2022-11-02 20:42:23,847 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 391 transitions. Word has length 48 [2022-11-02 20:42:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 391 transitions. [2022-11-02 20:42:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:42:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 391 transitions. [2022-11-02 20:42:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:42:23,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:23,849 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:23,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:42:24,066 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:24,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2022-11-02 20:42:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:24,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192810392] [2022-11-02 20:42:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:24,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:42:24,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192810392] [2022-11-02 20:42:24,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192810392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097896805] [2022-11-02 20:42:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:24,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:24,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:24,872 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:24,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:42:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:24,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:42:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:25,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:25,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:42:25,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:42:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:25,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:26,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097896805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:26,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:26,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2022-11-02 20:42:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249731759] [2022-11-02 20:42:26,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:26,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:42:26,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:42:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:42:26,178 INFO L87 Difference]: Start difference. First operand 323 states and 391 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:42:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:28,263 INFO L93 Difference]: Finished difference Result 395 states and 447 transitions. [2022-11-02 20:42:28,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:42:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-02 20:42:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:28,272 INFO L225 Difference]: With dead ends: 395 [2022-11-02 20:42:28,272 INFO L226 Difference]: Without dead ends: 395 [2022-11-02 20:42:28,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:42:28,279 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 554 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:28,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 291 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 607 Invalid, 0 Unknown, 123 Unchecked, 0.7s Time] [2022-11-02 20:42:28,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-02 20:42:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 323. [2022-11-02 20:42:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.25) internal successors, (365), 306 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 388 transitions. [2022-11-02 20:42:28,290 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 388 transitions. Word has length 50 [2022-11-02 20:42:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:28,291 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 388 transitions. [2022-11-02 20:42:28,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:42:28,291 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 388 transitions. [2022-11-02 20:42:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:42:28,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:28,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:28,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:28,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:42:28,518 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2022-11-02 20:42:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:28,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095459758] [2022-11-02 20:42:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:28,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:28,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:28,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095459758] [2022-11-02 20:42:28,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095459758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244510430] [2022-11-02 20:42:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:28,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:28,886 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:28,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:42:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:29,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:42:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:29,197 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:42:29,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:42:29,384 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:29,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:42:29,439 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:42:29,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:42:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:29,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:29,608 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:42:29,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-11-02 20:42:29,878 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:42:29,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2022-11-02 20:42:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:30,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244510430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:30,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:30,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 25 [2022-11-02 20:42:30,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025026782] [2022-11-02 20:42:30,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:30,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:42:30,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:30,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:42:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:42:30,180 INFO L87 Difference]: Start difference. First operand 323 states and 388 transitions. Second operand has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:42:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:30,600 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2022-11-02 20:42:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:42:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2022-11-02 20:42:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:30,602 INFO L225 Difference]: With dead ends: 336 [2022-11-02 20:42:30,603 INFO L226 Difference]: Without dead ends: 336 [2022-11-02 20:42:30,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:42:30,606 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 349 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:30,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 96 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:42:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-02 20:42:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2022-11-02 20:42:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2431506849315068) internal successors, (363), 305 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:30,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 386 transitions. [2022-11-02 20:42:30,616 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 386 transitions. Word has length 51 [2022-11-02 20:42:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:30,616 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 386 transitions. [2022-11-02 20:42:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:42:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 386 transitions. [2022-11-02 20:42:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:42:30,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:30,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:30,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:30,830 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:30,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:30,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2022-11-02 20:42:30,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832722872] [2022-11-02 20:42:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:30,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:31,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:31,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:31,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:31,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832722872] [2022-11-02 20:42:31,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832722872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263108030] [2022-11-02 20:42:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:31,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:31,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:31,161 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:31,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:42:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:31,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:42:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:31,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:31,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:42:31,482 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:42:31,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:42:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:31,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:31,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263108030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:31,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:42:31,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-11-02 20:42:31,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961242632] [2022-11-02 20:42:31,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:31,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:42:31,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:42:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:42:31,548 INFO L87 Difference]: Start difference. First operand 322 states and 386 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:31,758 INFO L93 Difference]: Finished difference Result 371 states and 433 transitions. [2022-11-02 20:42:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:42:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-11-02 20:42:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:31,760 INFO L225 Difference]: With dead ends: 371 [2022-11-02 20:42:31,761 INFO L226 Difference]: Without dead ends: 371 [2022-11-02 20:42:31,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:42:31,762 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 256 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:31,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 63 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-02 20:42:31,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2022-11-02 20:42:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2328767123287672) internal successors, (360), 305 states have internal predecessors, (360), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 383 transitions. [2022-11-02 20:42:31,780 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 383 transitions. Word has length 51 [2022-11-02 20:42:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:31,781 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 383 transitions. [2022-11-02 20:42:31,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:42:31,781 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 383 transitions. [2022-11-02 20:42:31,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:42:31,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:31,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:31,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:32,010 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2022-11-02 20:42:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936870432] [2022-11-02 20:42:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:32,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:32,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936870432] [2022-11-02 20:42:32,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936870432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:32,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493122309] [2022-11-02 20:42:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:32,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:32,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:32,307 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:32,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:42:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:42:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:32,545 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:32,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:42:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:32,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:32,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493122309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:32,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:32,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-11-02 20:42:32,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579551425] [2022-11-02 20:42:32,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:42:32,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:42:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:42:32,830 INFO L87 Difference]: Start difference. First operand 322 states and 383 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:42:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:33,258 INFO L93 Difference]: Finished difference Result 344 states and 399 transitions. [2022-11-02 20:42:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:42:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-11-02 20:42:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:33,261 INFO L225 Difference]: With dead ends: 344 [2022-11-02 20:42:33,261 INFO L226 Difference]: Without dead ends: 344 [2022-11-02 20:42:33,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:42:33,262 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:33,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 150 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 225 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-02 20:42:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-02 20:42:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2022-11-02 20:42:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.226027397260274) internal successors, (358), 305 states have internal predecessors, (358), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 381 transitions. [2022-11-02 20:42:33,269 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 381 transitions. Word has length 51 [2022-11-02 20:42:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:33,282 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 381 transitions. [2022-11-02 20:42:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:42:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 381 transitions. [2022-11-02 20:42:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:42:33,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:33,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:33,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:33,484 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2001887703, now seen corresponding path program 2 times [2022-11-02 20:42:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:33,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56615256] [2022-11-02 20:42:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56615256] [2022-11-02 20:42:33,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56615256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824766060] [2022-11-02 20:42:33,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:33,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:33,782 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:33,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:42:33,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:42:33,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:33,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:42:33,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:34,084 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:34,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:42:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:34,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824766060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:34,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:34,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-11-02 20:42:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195867997] [2022-11-02 20:42:34,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:34,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:42:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:42:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:42:34,214 INFO L87 Difference]: Start difference. First operand 322 states and 381 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:42:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:34,684 INFO L93 Difference]: Finished difference Result 343 states and 394 transitions. [2022-11-02 20:42:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:42:34,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-11-02 20:42:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:34,687 INFO L225 Difference]: With dead ends: 343 [2022-11-02 20:42:34,687 INFO L226 Difference]: Without dead ends: 343 [2022-11-02 20:42:34,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:42:34,688 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 217 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:34,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 146 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 205 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-02 20:42:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-02 20:42:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 322. [2022-11-02 20:42:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2226027397260273) internal successors, (357), 305 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 380 transitions. [2022-11-02 20:42:34,697 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 380 transitions. Word has length 51 [2022-11-02 20:42:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:34,697 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 380 transitions. [2022-11-02 20:42:34,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:42:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 380 transitions. [2022-11-02 20:42:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:42:34,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:34,699 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:34,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:34,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-02 20:42:34,926 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:34,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2022-11-02 20:42:34,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:34,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298810551] [2022-11-02 20:42:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:34,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:35,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:36,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298810551] [2022-11-02 20:42:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298810551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650220227] [2022-11-02 20:42:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:36,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:36,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:36,396 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:36,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:42:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:42:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:36,863 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:42:36,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:42:37,254 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-02 20:42:37,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-02 20:42:37,333 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-02 20:42:37,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-02 20:42:37,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:42:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:37,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:37,773 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-02 20:42:37,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 81 [2022-11-02 20:42:38,266 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-02 20:42:38,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 185 [2022-11-02 20:42:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:38,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650220227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:38,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:38,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2022-11-02 20:42:38,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207581183] [2022-11-02 20:42:38,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:42:38,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:38,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:42:38,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1875, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:42:38,848 INFO L87 Difference]: Start difference. First operand 322 states and 380 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:42:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:40,413 INFO L93 Difference]: Finished difference Result 373 states and 432 transitions. [2022-11-02 20:42:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:42:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2022-11-02 20:42:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:40,418 INFO L225 Difference]: With dead ends: 373 [2022-11-02 20:42:40,418 INFO L226 Difference]: Without dead ends: 373 [2022-11-02 20:42:40,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 20:42:40,420 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 895 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:40,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 218 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 727 Invalid, 0 Unknown, 21 Unchecked, 0.8s Time] [2022-11-02 20:42:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-02 20:42:40,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 322. [2022-11-02 20:42:40,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 305 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:40,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 378 transitions. [2022-11-02 20:42:40,436 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 378 transitions. Word has length 52 [2022-11-02 20:42:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:40,436 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 378 transitions. [2022-11-02 20:42:40,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:42:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 378 transitions. [2022-11-02 20:42:40,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:42:40,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:40,438 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:40,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:40,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:40,654 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:40,655 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2022-11-02 20:42:40,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:40,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661204150] [2022-11-02 20:42:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:40,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:42:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661204150] [2022-11-02 20:42:41,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661204150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927986209] [2022-11-02 20:42:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:41,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:41,037 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:41,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:42:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:41,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:42:41,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:41,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:42:41,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:41,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927986209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:41,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:41,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2022-11-02 20:42:41,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632950982] [2022-11-02 20:42:41,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:41,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:42:41,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:41,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:42:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:42:41,706 INFO L87 Difference]: Start difference. First operand 322 states and 378 transitions. Second operand has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:42:42,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:42,433 INFO L93 Difference]: Finished difference Result 349 states and 394 transitions. [2022-11-02 20:42:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:42:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-11-02 20:42:42,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:42,434 INFO L225 Difference]: With dead ends: 349 [2022-11-02 20:42:42,434 INFO L226 Difference]: Without dead ends: 349 [2022-11-02 20:42:42,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:42:42,435 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 298 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:42,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 274 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 364 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-11-02 20:42:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-02 20:42:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 322. [2022-11-02 20:42:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1952054794520548) internal successors, (349), 305 states have internal predecessors, (349), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 372 transitions. [2022-11-02 20:42:42,445 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 372 transitions. Word has length 52 [2022-11-02 20:42:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:42,446 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 372 transitions. [2022-11-02 20:42:42,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:42:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 372 transitions. [2022-11-02 20:42:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:42:42,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:42,448 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:42,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-02 20:42:42,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-02 20:42:42,658 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2022-11-02 20:42:42,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:42,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194227567] [2022-11-02 20:42:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:42:43,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:43,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194227567] [2022-11-02 20:42:43,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194227567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:43,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964026869] [2022-11-02 20:42:43,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:43,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:43,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:43,034 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:42:43,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:42:43,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:42:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:43,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:43,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:43,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964026869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:43,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:43,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2022-11-02 20:42:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758623858] [2022-11-02 20:42:43,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:42:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:42:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:42:43,622 INFO L87 Difference]: Start difference. First operand 322 states and 372 transitions. Second operand has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:42:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:44,192 INFO L93 Difference]: Finished difference Result 350 states and 392 transitions. [2022-11-02 20:42:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:42:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-11-02 20:42:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:44,194 INFO L225 Difference]: With dead ends: 350 [2022-11-02 20:42:44,195 INFO L226 Difference]: Without dead ends: 350 [2022-11-02 20:42:44,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:42:44,195 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 291 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:44,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 184 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 246 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-11-02 20:42:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-02 20:42:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 322. [2022-11-02 20:42:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1883561643835616) internal successors, (347), 305 states have internal predecessors, (347), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 370 transitions. [2022-11-02 20:42:44,203 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 370 transitions. Word has length 52 [2022-11-02 20:42:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:44,204 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 370 transitions. [2022-11-02 20:42:44,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:42:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 370 transitions. [2022-11-02 20:42:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:42:44,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:44,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:44,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-02 20:42:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-02 20:42:44,426 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2022-11-02 20:42:44,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:44,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422419397] [2022-11-02 20:42:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:44,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:44,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:44,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:44,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422419397] [2022-11-02 20:42:44,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422419397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:44,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169280816] [2022-11-02 20:42:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:44,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:44,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:44,907 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:44,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:42:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:45,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:42:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:45,134 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:45,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:42:45,340 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-02 20:42:45,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-02 20:42:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:45,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:45,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169280816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:45,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:45,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-11-02 20:42:45,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49567041] [2022-11-02 20:42:45,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:42:45,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:45,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:42:45,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:42:45,816 INFO L87 Difference]: Start difference. First operand 322 states and 370 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:42:46,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:46,799 INFO L93 Difference]: Finished difference Result 346 states and 390 transitions. [2022-11-02 20:42:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:42:46,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-11-02 20:42:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:46,801 INFO L225 Difference]: With dead ends: 346 [2022-11-02 20:42:46,801 INFO L226 Difference]: Without dead ends: 346 [2022-11-02 20:42:46,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:42:46,802 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 345 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:46,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 321 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 378 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-11-02 20:42:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-02 20:42:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 321. [2022-11-02 20:42:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1815068493150684) internal successors, (345), 304 states have internal predecessors, (345), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 368 transitions. [2022-11-02 20:42:46,811 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 368 transitions. Word has length 54 [2022-11-02 20:42:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:46,811 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 368 transitions. [2022-11-02 20:42:46,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:42:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 368 transitions. [2022-11-02 20:42:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 20:42:46,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:46,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:46,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:47,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-02 20:42:47,026 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2022-11-02 20:42:47,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:47,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800756073] [2022-11-02 20:42:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:47,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:47,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:47,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:47,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:47,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800756073] [2022-11-02 20:42:47,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800756073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751142934] [2022-11-02 20:42:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:47,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:47,539 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:47,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:42:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:42:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:48,357 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:42:48,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:42:48,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:42:48,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-02 20:42:48,385 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:42:48,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:42:48,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:42:48,764 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:42:48,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:42:48,778 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:42:48,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-02 20:42:49,065 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:42:49,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-02 20:42:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:49,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:49,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:42:49,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751142934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:49,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:49,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2022-11-02 20:42:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048271817] [2022-11-02 20:42:49,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:42:49,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:42:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:42:49,448 INFO L87 Difference]: Start difference. First operand 321 states and 368 transitions. Second operand has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:42:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:51,922 INFO L93 Difference]: Finished difference Result 350 states and 389 transitions. [2022-11-02 20:42:51,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:42:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-11-02 20:42:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:51,925 INFO L225 Difference]: With dead ends: 350 [2022-11-02 20:42:51,925 INFO L226 Difference]: Without dead ends: 350 [2022-11-02 20:42:51,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:42:51,928 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 515 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:51,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 700 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 628 Invalid, 0 Unknown, 520 Unchecked, 0.5s Time] [2022-11-02 20:42:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-02 20:42:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 320. [2022-11-02 20:42:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 292 states have (on average 1.1746575342465753) internal successors, (343), 303 states have internal predecessors, (343), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 366 transitions. [2022-11-02 20:42:51,937 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 366 transitions. Word has length 55 [2022-11-02 20:42:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:51,937 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 366 transitions. [2022-11-02 20:42:51,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:42:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 366 transitions. [2022-11-02 20:42:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:42:51,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:51,939 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:51,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-02 20:42:52,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-02 20:42:52,153 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2022-11-02 20:42:52,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170196538] [2022-11-02 20:42:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:52,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:42:52,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170196538] [2022-11-02 20:42:52,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170196538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:52,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588141325] [2022-11-02 20:42:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:42:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:52,563 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:52,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:42:52,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:42:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:42:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:53,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:42:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:42:53,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:53,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588141325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:53,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:53,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-11-02 20:42:53,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503663878] [2022-11-02 20:42:53,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:53,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:42:53,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:42:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:42:53,611 INFO L87 Difference]: Start difference. First operand 320 states and 366 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:42:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:54,434 INFO L93 Difference]: Finished difference Result 343 states and 382 transitions. [2022-11-02 20:42:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:42:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2022-11-02 20:42:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:54,436 INFO L225 Difference]: With dead ends: 343 [2022-11-02 20:42:54,436 INFO L226 Difference]: Without dead ends: 343 [2022-11-02 20:42:54,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:42:54,437 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 375 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:54,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 303 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 381 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-11-02 20:42:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-02 20:42:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 320. [2022-11-02 20:42:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 292 states have (on average 1.1643835616438356) internal successors, (340), 303 states have internal predecessors, (340), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 363 transitions. [2022-11-02 20:42:54,445 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 363 transitions. Word has length 56 [2022-11-02 20:42:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:54,446 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 363 transitions. [2022-11-02 20:42:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:42:54,446 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 363 transitions. [2022-11-02 20:42:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:42:54,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:54,447 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:54,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-02 20:42:54,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-02 20:42:54,665 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2022-11-02 20:42:54,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:54,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989714891] [2022-11-02 20:42:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:54,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:42:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:42:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:42:55,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:55,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989714891] [2022-11-02 20:42:55,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989714891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:55,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002397687] [2022-11-02 20:42:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:55,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:55,391 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:55,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:42:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:42:55,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:55,782 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:42:55,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:42:56,063 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:42:56,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-02 20:42:56,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:42:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:56,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:42:56,475 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:42:56,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-02 20:42:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:56,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:56,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-02 20:42:56,824 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:42:56,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-02 20:42:56,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002397687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:56,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:56,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2022-11-02 20:42:56,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049773682] [2022-11-02 20:42:56,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:56,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:42:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:42:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:42:56,902 INFO L87 Difference]: Start difference. First operand 320 states and 363 transitions. Second operand has 30 states, 27 states have (on average 4.0) internal successors, (108), 24 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:42:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:59,301 INFO L93 Difference]: Finished difference Result 350 states and 385 transitions. [2022-11-02 20:42:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:42:59,302 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 4.0) internal successors, (108), 24 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2022-11-02 20:42:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:59,303 INFO L225 Difference]: With dead ends: 350 [2022-11-02 20:42:59,304 INFO L226 Difference]: Without dead ends: 350 [2022-11-02 20:42:59,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1114, Invalid=3998, Unknown=0, NotChecked=0, Total=5112 [2022-11-02 20:42:59,306 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 643 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:59,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 407 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 514 Invalid, 0 Unknown, 220 Unchecked, 0.5s Time] [2022-11-02 20:42:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-02 20:42:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 317. [2022-11-02 20:42:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 292 states have (on average 1.1506849315068493) internal successors, (336), 300 states have internal predecessors, (336), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-02 20:42:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 359 transitions. [2022-11-02 20:42:59,313 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 359 transitions. Word has length 59 [2022-11-02 20:42:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:59,313 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 359 transitions. [2022-11-02 20:42:59,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 4.0) internal successors, (108), 24 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:42:59,313 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 359 transitions. [2022-11-02 20:42:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:42:59,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:59,314 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:59,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-02 20:42:59,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-02 20:42:59,515 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:42:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2022-11-02 20:42:59,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949835926] [2022-11-02 20:42:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:43:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:43:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949835926] [2022-11-02 20:43:00,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949835926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:00,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976612301] [2022-11-02 20:43:00,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:00,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:00,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:00,332 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:00,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-02 20:43:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:00,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:43:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:00,660 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:43:00,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:43:00,966 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-02 20:43:00,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-02 20:43:01,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:43:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:01,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:01,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976612301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:01,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:01,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-11-02 20:43:01,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457023465] [2022-11-02 20:43:01,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:01,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:43:01,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:43:01,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:43:01,293 INFO L87 Difference]: Start difference. First operand 317 states and 359 transitions. Second operand has 26 states, 24 states have (on average 4.5) internal successors, (108), 22 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:43:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:03,141 INFO L93 Difference]: Finished difference Result 341 states and 378 transitions. [2022-11-02 20:43:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-02 20:43:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.5) internal successors, (108), 22 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-11-02 20:43:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:03,144 INFO L225 Difference]: With dead ends: 341 [2022-11-02 20:43:03,144 INFO L226 Difference]: Without dead ends: 341 [2022-11-02 20:43:03,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=604, Invalid=2818, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 20:43:03,146 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 531 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:03,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 266 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 465 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-11-02 20:43:03,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-02 20:43:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 280. [2022-11-02 20:43:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 259 states have (on average 1.138996138996139) internal successors, (295), 265 states have internal predecessors, (295), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-02 20:43:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 314 transitions. [2022-11-02 20:43:03,155 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 314 transitions. Word has length 60 [2022-11-02 20:43:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:03,156 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 314 transitions. [2022-11-02 20:43:03,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.5) internal successors, (108), 22 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:43:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 314 transitions. [2022-11-02 20:43:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-02 20:43:03,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:03,158 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:03,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-02 20:43:03,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:03,374 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:03,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2022-11-02 20:43:03,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:03,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53661704] [2022-11-02 20:43:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:03,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:04,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:43:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:43:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:04,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53661704] [2022-11-02 20:43:04,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53661704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:04,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898346239] [2022-11-02 20:43:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:04,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:04,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:04,462 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:04,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-02 20:43:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:04,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-02 20:43:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:05,408 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:43:05,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:43:05,433 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:43:05,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:43:06,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:43:06,251 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:43:06,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:43:06,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:06,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-11-02 20:43:06,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-02 20:43:06,921 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:06,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-02 20:43:06,995 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:43:06,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-11-02 20:43:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:07,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:07,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-02 20:43:07,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898346239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:07,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:07,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2022-11-02 20:43:07,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599705885] [2022-11-02 20:43:07,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:07,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:43:07,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:07,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:43:07,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:43:07,540 INFO L87 Difference]: Start difference. First operand 280 states and 314 transitions. Second operand has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:43:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:13,563 INFO L93 Difference]: Finished difference Result 358 states and 395 transitions. [2022-11-02 20:43:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-02 20:43:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-11-02 20:43:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:13,565 INFO L225 Difference]: With dead ends: 358 [2022-11-02 20:43:13,566 INFO L226 Difference]: Without dead ends: 358 [2022-11-02 20:43:13,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1134, Invalid=6698, Unknown=0, NotChecked=0, Total=7832 [2022-11-02 20:43:13,569 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 559 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:13,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 550 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 756 Invalid, 0 Unknown, 497 Unchecked, 0.8s Time] [2022-11-02 20:43:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-02 20:43:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 285. [2022-11-02 20:43:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 264 states have (on average 1.1363636363636365) internal successors, (300), 270 states have internal predecessors, (300), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-02 20:43:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 319 transitions. [2022-11-02 20:43:13,577 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 319 transitions. Word has length 61 [2022-11-02 20:43:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:13,578 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 319 transitions. [2022-11-02 20:43:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:43:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 319 transitions. [2022-11-02 20:43:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:43:13,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:13,580 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:13,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:13,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-02 20:43:13,802 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:13,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:13,803 INFO L85 PathProgramCache]: Analyzing trace with hash -340935575, now seen corresponding path program 1 times [2022-11-02 20:43:13,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:13,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342988971] [2022-11-02 20:43:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:13,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:43:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:43:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:14,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342988971] [2022-11-02 20:43:14,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342988971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:14,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893651711] [2022-11-02 20:43:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:14,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:14,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:14,805 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:14,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-02 20:43:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:43:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:15,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:43:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:15,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:15,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-02 20:43:15,803 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:15,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-02 20:43:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:15,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893651711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:15,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:43:15,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 12] total 38 [2022-11-02 20:43:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352341132] [2022-11-02 20:43:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:15,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:43:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:43:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:43:15,944 INFO L87 Difference]: Start difference. First operand 285 states and 319 transitions. Second operand has 38 states, 36 states have (on average 4.694444444444445) internal successors, (169), 31 states have internal predecessors, (169), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:20,681 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2022-11-02 20:43:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:43:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 4.694444444444445) internal successors, (169), 31 states have internal predecessors, (169), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2022-11-02 20:43:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:20,683 INFO L225 Difference]: With dead ends: 336 [2022-11-02 20:43:20,683 INFO L226 Difference]: Without dead ends: 336 [2022-11-02 20:43:20,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=984, Invalid=4128, Unknown=0, NotChecked=0, Total=5112 [2022-11-02 20:43:20,685 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1204 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:20,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 460 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:43:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-02 20:43:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 233. [2022-11-02 20:43:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 215 states have (on average 1.1023255813953488) internal successors, (237), 220 states have internal predecessors, (237), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-02 20:43:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 254 transitions. [2022-11-02 20:43:20,692 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 254 transitions. Word has length 63 [2022-11-02 20:43:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:20,692 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 254 transitions. [2022-11-02 20:43:20,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 4.694444444444445) internal successors, (169), 31 states have internal predecessors, (169), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 254 transitions. [2022-11-02 20:43:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:43:20,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:20,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:20,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:20,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-02 20:43:20,914 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash -597195437, now seen corresponding path program 1 times [2022-11-02 20:43:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:20,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835806006] [2022-11-02 20:43:20,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:20,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:43:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:43:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:43:21,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:21,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835806006] [2022-11-02 20:43:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835806006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:21,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457832268] [2022-11-02 20:43:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:21,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:21,101 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:21,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-02 20:43:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:43:21,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:21,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:43:21,346 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:43:21,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:43:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 29 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:43:21,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:21,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457832268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:21,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:21,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2022-11-02 20:43:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441320955] [2022-11-02 20:43:21,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:21,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:43:21,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:21,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:43:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:43:21,460 INFO L87 Difference]: Start difference. First operand 233 states and 254 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:43:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:21,581 INFO L93 Difference]: Finished difference Result 322 states and 353 transitions. [2022-11-02 20:43:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:43:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-11-02 20:43:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:21,583 INFO L225 Difference]: With dead ends: 322 [2022-11-02 20:43:21,583 INFO L226 Difference]: Without dead ends: 322 [2022-11-02 20:43:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:43:21,584 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:21,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 82 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:43:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-02 20:43:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 309. [2022-11-02 20:43:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 284 states have (on average 1.1056338028169015) internal successors, (314), 292 states have internal predecessors, (314), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-11-02 20:43:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 341 transitions. [2022-11-02 20:43:21,591 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 341 transitions. Word has length 63 [2022-11-02 20:43:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:21,591 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 341 transitions. [2022-11-02 20:43:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:43:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 341 transitions. [2022-11-02 20:43:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:43:21,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:21,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:21,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-02 20:43:21,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-02 20:43:21,818 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash 701075492, now seen corresponding path program 1 times [2022-11-02 20:43:21,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:21,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822682180] [2022-11-02 20:43:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:22,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:43:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:22,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:43:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:22,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822682180] [2022-11-02 20:43:22,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822682180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:22,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098482060] [2022-11-02 20:43:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:22,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:22,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:22,182 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:22,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-02 20:43:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:43:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:22,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:43:22,580 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:43:22,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 21 [2022-11-02 20:43:22,614 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:43:22,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:43:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:22,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:22,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098482060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:22,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:22,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-02 20:43:22,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695806866] [2022-11-02 20:43:22,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:22,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:43:22,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:22,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:43:22,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:43:22,715 INFO L87 Difference]: Start difference. First operand 309 states and 341 transitions. Second operand has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:43:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:22,977 INFO L93 Difference]: Finished difference Result 315 states and 345 transitions. [2022-11-02 20:43:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:43:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-11-02 20:43:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:22,978 INFO L225 Difference]: With dead ends: 315 [2022-11-02 20:43:22,978 INFO L226 Difference]: Without dead ends: 315 [2022-11-02 20:43:22,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:22,979 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 96 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:22,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 154 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 187 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-11-02 20:43:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-02 20:43:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 267. [2022-11-02 20:43:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 245 states have (on average 1.0979591836734695) internal successors, (269), 252 states have internal predecessors, (269), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-02 20:43:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 292 transitions. [2022-11-02 20:43:22,986 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 292 transitions. Word has length 66 [2022-11-02 20:43:22,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:22,987 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 292 transitions. [2022-11-02 20:43:22,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:43:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 292 transitions. [2022-11-02 20:43:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-02 20:43:22,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:22,989 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:23,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:23,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-02 20:43:23,206 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1953429379, now seen corresponding path program 1 times [2022-11-02 20:43:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:23,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774262160] [2022-11-02 20:43:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:23,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:23,229 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:43:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:43:23,284 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:43:23,284 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:43:23,285 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-02 20:43:23,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-02 20:43:23,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-02 20:43:23,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-02 20:43:23,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-02 20:43:23,288 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-02 20:43:23,289 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-02 20:43:23,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-02 20:43:23,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-02 20:43:23,290 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2022-11-02 20:43:23,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2022-11-02 20:43:23,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2022-11-02 20:43:23,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2022-11-02 20:43:23,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2022-11-02 20:43:23,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2022-11-02 20:43:23,291 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2022-11-02 20:43:23,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2022-11-02 20:43:23,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2022-11-02 20:43:23,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2022-11-02 20:43:23,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2022-11-02 20:43:23,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2022-11-02 20:43:23,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2022-11-02 20:43:23,293 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2022-11-02 20:43:23,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-02 20:43:23,297 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:23,301 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:43:23,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:43:23 BoogieIcfgContainer [2022-11-02 20:43:23,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:43:23,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:43:23,391 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:43:23,392 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:43:23,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:46" (3/4) ... [2022-11-02 20:43:23,395 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:43:23,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:43:23,396 INFO L158 Benchmark]: Toolchain (without parser) took 97772.31ms. Allocated memory was 104.9MB in the beginning and 325.1MB in the end (delta: 220.2MB). Free memory was 78.5MB in the beginning and 235.8MB in the end (delta: -157.3MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2022-11-02 20:43:23,396 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:43:23,397 INFO L158 Benchmark]: CACSL2BoogieTranslator took 655.69ms. Allocated memory was 104.9MB in the beginning and 155.2MB in the end (delta: 50.3MB). Free memory was 78.2MB in the beginning and 120.8MB in the end (delta: -42.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:43:23,397 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.06ms. Allocated memory is still 155.2MB. Free memory was 120.8MB in the beginning and 118.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:43:23,397 INFO L158 Benchmark]: Boogie Preprocessor took 37.72ms. Allocated memory is still 155.2MB. Free memory was 118.3MB in the beginning and 117.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:43:23,398 INFO L158 Benchmark]: RCFGBuilder took 588.87ms. Allocated memory is still 155.2MB. Free memory was 116.6MB in the beginning and 101.2MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-02 20:43:23,398 INFO L158 Benchmark]: TraceAbstraction took 96408.07ms. Allocated memory was 155.2MB in the beginning and 325.1MB in the end (delta: 169.9MB). Free memory was 100.4MB in the beginning and 235.8MB in the end (delta: -135.4MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. [2022-11-02 20:43:23,398 INFO L158 Benchmark]: Witness Printer took 4.64ms. Allocated memory is still 325.1MB. Free memory is still 235.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:43:23,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 104.9MB. Free memory is still 59.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 655.69ms. Allocated memory was 104.9MB in the beginning and 155.2MB in the end (delta: 50.3MB). Free memory was 78.2MB in the beginning and 120.8MB in the end (delta: -42.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.06ms. Allocated memory is still 155.2MB. Free memory was 120.8MB in the beginning and 118.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.72ms. Allocated memory is still 155.2MB. Free memory was 118.3MB in the beginning and 117.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 588.87ms. Allocated memory is still 155.2MB. Free memory was 116.6MB in the beginning and 101.2MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 96408.07ms. Allocated memory was 155.2MB in the beginning and 325.1MB in the end (delta: 169.9MB). Free memory was 100.4MB in the beginning and 235.8MB in the end (delta: -135.4MB). Peak memory consumption was 37.4MB. Max. memory is 16.1GB. * Witness Printer took 4.64ms. Allocated memory is still 325.1MB. Free memory is still 235.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 67 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 96.2s, OverallIterations: 46, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 40.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13762 SdHoareTripleChecker+Valid, 14.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13748 mSDsluCounter, 11022 SdHoareTripleChecker+Invalid, 12.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2648 IncrementalHoareTripleChecker+Unchecked, 8907 mSDsCounter, 2141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13097 IncrementalHoareTripleChecker+Invalid, 17886 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2141 mSolverCounterUnsat, 2115 mSDtfsCounter, 13097 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3086 GetRequests, 1992 SyntacticMatches, 38 SemanticMatches, 1056 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 10859 ImplicationChecksByTransitivity, 39.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=661occurred in iteration=21, InterpolantAutomatonStates: 693, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 45 MinimizatonAttempts, 2367 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 42.6s InterpolantComputationTime, 3204 NumberOfCodeBlocks, 3204 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 3466 ConstructedInterpolants, 270 QuantifiedInterpolants, 40919 SizeOfPredicates, 167 NumberOfNonLiveVariables, 9084 ConjunctsInSsa, 708 ConjunctsInUnsatCore, 89 InterpolantComputations, 15 PerfectInterpolantSequences, 949/2100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 20:43:23,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- 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-5e519f3 [2022-11-02 20:43:25,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:43:25,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:43:25,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:43:25,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:43:25,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:43:25,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:43:25,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:43:25,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:43:25,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:43:25,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:43:25,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:43:25,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:43:25,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:43:25,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:43:25,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:43:25,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:43:25,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:43:25,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:43:25,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:43:25,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:43:25,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:43:25,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:43:25,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:43:25,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:43:25,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:43:25,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:43:25,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:43:25,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:43:25,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:43:25,875 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:43:25,876 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:43:25,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:43:25,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:43:25,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:43:25,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:43:25,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:43:25,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:43:25,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:43:25,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:43:25,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:43:25,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-11-02 20:43:25,908 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:43:25,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:43:25,909 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:43:25,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:43:25,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:43:25,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:43:25,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:43:25,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:43:25,912 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:43:25,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:43:25,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:43:25,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:43:25,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:43:25,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:43:25,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:43:25,914 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:43:25,914 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:43:25,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:43:25,915 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:43:25,915 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:43:25,915 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:43:25,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:43:25,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:43:25,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:43:25,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:43:25,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:43:25,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:25,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:43:25,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:43:25,918 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:43:25,918 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:43:25,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:43:25,919 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2022-11-02 20:43:26,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:43:26,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:43:26,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:43:26,330 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:43:26,331 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:43:26,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-02 20:43:26,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/401e47f06/90891b84f07340fda3ee17cc13d8a4bd/FLAGb2dcdaa18 [2022-11-02 20:43:27,194 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:43:27,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-11-02 20:43:27,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/401e47f06/90891b84f07340fda3ee17cc13d8a4bd/FLAGb2dcdaa18 [2022-11-02 20:43:27,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/data/401e47f06/90891b84f07340fda3ee17cc13d8a4bd [2022-11-02 20:43:27,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:43:27,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:43:27,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:27,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:43:27,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:43:27,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:27" (1/1) ... [2022-11-02 20:43:27,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64c6ddfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:27, skipping insertion in model container [2022-11-02 20:43:27,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:43:27" (1/1) ... [2022-11-02 20:43:27,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:43:27,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:43:27,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:27,939 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:43:28,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:43:28,053 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:43:28,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28 WrapperNode [2022-11-02 20:43:28,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:43:28,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:28,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:43:28,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:43:28,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,152 INFO L138 Inliner]: procedures = 169, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-11-02 20:43:28,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:43:28,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:43:28,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:43:28,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:43:28,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:43:28,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:43:28,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:43:28,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:43:28,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (1/1) ... [2022-11-02 20:43:28,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:43:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:28,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:43:28,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:43:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-02 20:43:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-02 20:43:28,339 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-02 20:43:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:43:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:43:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:43:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:43:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:43:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 20:43:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:43:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:43:28,608 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:43:28,617 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:43:29,104 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:43:29,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:43:29,111 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:43:29,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:29 BoogieIcfgContainer [2022-11-02 20:43:29,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:43:29,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:43:29,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:43:29,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:43:29,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:43:27" (1/3) ... [2022-11-02 20:43:29,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54242b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:29, skipping insertion in model container [2022-11-02 20:43:29,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:43:28" (2/3) ... [2022-11-02 20:43:29,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54242b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:43:29, skipping insertion in model container [2022-11-02 20:43:29,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:43:29" (3/3) ... [2022-11-02 20:43:29,135 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2022-11-02 20:43:29,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:43:29,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-11-02 20:43:29,223 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:43:29,231 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;@33e33483, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:43:29,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-02 20:43:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:43:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:43:29,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:29,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:43:29,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:29,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:29,253 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2022-11-02 20:43:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:29,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959610796] [2022-11-02 20:43:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:29,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:29,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:29,278 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:29,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:43:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:43:29,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:29,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:29,577 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:29,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959610796] [2022-11-02 20:43:29,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959610796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:29,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:29,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:43:29,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682763669] [2022-11-02 20:43:29,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:29,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:29,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:29,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:29,616 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:29,866 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2022-11-02 20:43:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:29,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:43:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:29,880 INFO L225 Difference]: With dead ends: 121 [2022-11-02 20:43:29,880 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:43:29,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:29,895 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:29,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:43:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:43:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2022-11-02 20:43:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 80 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-02 20:43:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-11-02 20:43:29,974 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 6 [2022-11-02 20:43:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:29,974 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-11-02 20:43:29,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-11-02 20:43:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:43:29,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:29,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:43:29,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:30,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:30,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2022-11-02 20:43:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:30,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462233799] [2022-11-02 20:43:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:30,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:30,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:30,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:30,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:43:30,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:43:30,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:30,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:30,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:30,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462233799] [2022-11-02 20:43:30,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462233799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:30,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:30,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:30,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633898603] [2022-11-02 20:43:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:30,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:43:30,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:43:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:43:30,403 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:30,690 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2022-11-02 20:43:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:43:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-02 20:43:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:30,693 INFO L225 Difference]: With dead ends: 214 [2022-11-02 20:43:30,693 INFO L226 Difference]: Without dead ends: 214 [2022-11-02 20:43:30,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:43:30,695 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 143 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:30,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 158 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:43:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-02 20:43:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2022-11-02 20:43:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 142 states have internal predecessors, (212), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-02 20:43:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2022-11-02 20:43:30,714 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 6 [2022-11-02 20:43:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:30,715 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2022-11-02 20:43:30,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2022-11-02 20:43:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:43:30,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:30,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:30,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:30,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2022-11-02 20:43:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182717367] [2022-11-02 20:43:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:30,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:30,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:30,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:43:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:31,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:31,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:43:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:31,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:31,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182717367] [2022-11-02 20:43:31,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182717367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:31,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:31,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417003334] [2022-11-02 20:43:31,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:31,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:43:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:43:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:43:31,202 INFO L87 Difference]: Start difference. First operand 156 states and 243 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:31,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:31,737 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2022-11-02 20:43:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:43:31,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-02 20:43:31,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:31,740 INFO L225 Difference]: With dead ends: 247 [2022-11-02 20:43:31,741 INFO L226 Difference]: Without dead ends: 247 [2022-11-02 20:43:31,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:43:31,742 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:31,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 191 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:43:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-02 20:43:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2022-11-02 20:43:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 145 states have internal predecessors, (215), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-02 20:43:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2022-11-02 20:43:31,795 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 7 [2022-11-02 20:43:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:31,796 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2022-11-02 20:43:31,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2022-11-02 20:43:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:43:31,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:31,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:31,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:32,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2022-11-02 20:43:32,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:32,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194913429] [2022-11-02 20:43:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:32,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:32,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:43:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:43:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:32,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:43:32,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:43:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:32,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:32,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194913429] [2022-11-02 20:43:32,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194913429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:32,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:32,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600971737] [2022-11-02 20:43:32,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:43:32,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:32,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:43:32,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:43:32,301 INFO L87 Difference]: Start difference. First operand 159 states and 246 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:32,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:32,669 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2022-11-02 20:43:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:43:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 20:43:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:32,672 INFO L225 Difference]: With dead ends: 216 [2022-11-02 20:43:32,672 INFO L226 Difference]: Without dead ends: 216 [2022-11-02 20:43:32,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:43:32,674 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 146 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:32,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 210 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:43:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-02 20:43:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2022-11-02 20:43:32,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 145 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-02 20:43:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2022-11-02 20:43:32,690 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 8 [2022-11-02 20:43:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:32,690 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2022-11-02 20:43:32,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2022-11-02 20:43:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 20:43:32,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:32,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:32,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:32,905 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2022-11-02 20:43:32,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:32,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711598764] [2022-11-02 20:43:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:32,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:32,908 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:32,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:43:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:43:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:33,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:33,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711598764] [2022-11-02 20:43:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711598764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:33,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:33,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:33,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164910891] [2022-11-02 20:43:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:33,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:43:33,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:33,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:43:33,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:43:33,111 INFO L87 Difference]: Start difference. First operand 159 states and 244 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:33,368 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2022-11-02 20:43:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:43:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 20:43:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:33,371 INFO L225 Difference]: With dead ends: 253 [2022-11-02 20:43:33,372 INFO L226 Difference]: Without dead ends: 253 [2022-11-02 20:43:33,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:43:33,373 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:33,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:43:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-02 20:43:33,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2022-11-02 20:43:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 177 states have internal predecessors, (259), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-02 20:43:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2022-11-02 20:43:33,389 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2022-11-02 20:43:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:33,390 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2022-11-02 20:43:33,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2022-11-02 20:43:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:43:33,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:33,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:33,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:33,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:33,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2022-11-02 20:43:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361846950] [2022-11-02 20:43:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:33,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:33,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:33,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:33,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:43:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:33,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:33,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:33,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:33,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361846950] [2022-11-02 20:43:33,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361846950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:33,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:33,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010893317] [2022-11-02 20:43:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:33,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:43:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:43:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:43:33,817 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:34,118 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2022-11-02 20:43:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:43:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-02 20:43:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:34,121 INFO L225 Difference]: With dead ends: 242 [2022-11-02 20:43:34,121 INFO L226 Difference]: Without dead ends: 242 [2022-11-02 20:43:34,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:43:34,122 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:34,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:43:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-02 20:43:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2022-11-02 20:43:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 167 states have (on average 1.6766467065868262) internal successors, (280), 191 states have internal predecessors, (280), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-02 20:43:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 311 transitions. [2022-11-02 20:43:34,135 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 311 transitions. Word has length 10 [2022-11-02 20:43:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:34,135 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 311 transitions. [2022-11-02 20:43:34,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 311 transitions. [2022-11-02 20:43:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 20:43:34,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:34,137 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:34,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:34,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:34,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:34,350 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2022-11-02 20:43:34,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:34,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652910314] [2022-11-02 20:43:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:34,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:34,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:34,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:43:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:43:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:34,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:35,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:35,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652910314] [2022-11-02 20:43:35,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652910314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:35,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:35,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-02 20:43:35,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826287675] [2022-11-02 20:43:35,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:35,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:43:35,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:43:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:43:35,259 INFO L87 Difference]: Start difference. First operand 206 states and 311 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:35,995 INFO L93 Difference]: Finished difference Result 368 states and 497 transitions. [2022-11-02 20:43:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:43:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-02 20:43:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:35,999 INFO L225 Difference]: With dead ends: 368 [2022-11-02 20:43:35,999 INFO L226 Difference]: Without dead ends: 368 [2022-11-02 20:43:36,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:43:36,000 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 444 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:36,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 286 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:43:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-02 20:43:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 241. [2022-11-02 20:43:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 200 states have (on average 1.655) internal successors, (331), 226 states have internal predecessors, (331), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-02 20:43:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 368 transitions. [2022-11-02 20:43:36,013 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 368 transitions. Word has length 14 [2022-11-02 20:43:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:36,014 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 368 transitions. [2022-11-02 20:43:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 368 transitions. [2022-11-02 20:43:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:43:36,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:36,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:36,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:36,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:36,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2022-11-02 20:43:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961169139] [2022-11-02 20:43:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:36,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:36,230 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:36,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:43:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:43:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:36,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:43:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:36,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:36,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961169139] [2022-11-02 20:43:36,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961169139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:36,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:36,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-02 20:43:36,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591757914] [2022-11-02 20:43:36,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:36,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:36,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:36,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:36,784 INFO L87 Difference]: Start difference. First operand 241 states and 368 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:37,630 INFO L93 Difference]: Finished difference Result 418 states and 596 transitions. [2022-11-02 20:43:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:43:37,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:43:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:37,634 INFO L225 Difference]: With dead ends: 418 [2022-11-02 20:43:37,634 INFO L226 Difference]: Without dead ends: 418 [2022-11-02 20:43:37,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:43:37,635 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 242 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:37,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 449 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:43:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-02 20:43:37,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 251. [2022-11-02 20:43:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 210 states have (on average 1.6476190476190475) internal successors, (346), 236 states have internal predecessors, (346), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-02 20:43:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 383 transitions. [2022-11-02 20:43:37,652 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 383 transitions. Word has length 15 [2022-11-02 20:43:37,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:37,652 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 383 transitions. [2022-11-02 20:43:37,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:37,653 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 383 transitions. [2022-11-02 20:43:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:43:37,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:37,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:37,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:37,869 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2022-11-02 20:43:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:37,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255097269] [2022-11-02 20:43:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:37,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:37,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:37,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:37,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:43:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:37,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:43:37,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:38,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:43:38,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:43:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:38,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:38,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:38,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255097269] [2022-11-02 20:43:38,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255097269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:38,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:38,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-02 20:43:38,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003763395] [2022-11-02 20:43:38,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:38,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:38,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:38,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:38,612 INFO L87 Difference]: Start difference. First operand 251 states and 383 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:40,205 INFO L93 Difference]: Finished difference Result 634 states and 850 transitions. [2022-11-02 20:43:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:43:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:43:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:40,210 INFO L225 Difference]: With dead ends: 634 [2022-11-02 20:43:40,211 INFO L226 Difference]: Without dead ends: 634 [2022-11-02 20:43:40,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:43:40,212 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 606 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:40,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 633 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:43:40,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-02 20:43:40,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 349. [2022-11-02 20:43:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 330 states have internal predecessors, (503), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-02 20:43:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 553 transitions. [2022-11-02 20:43:40,247 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 553 transitions. Word has length 16 [2022-11-02 20:43:40,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:40,247 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 553 transitions. [2022-11-02 20:43:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 553 transitions. [2022-11-02 20:43:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:43:40,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:40,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:40,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:40,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:40,462 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2022-11-02 20:43:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:40,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776170154] [2022-11-02 20:43:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:40,463 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:40,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:40,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:43:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:40,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:43:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:40,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:40,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:40,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776170154] [2022-11-02 20:43:40,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776170154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:40,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:40,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:43:40,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133571441] [2022-11-02 20:43:40,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:40,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:40,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:40,600 INFO L87 Difference]: Start difference. First operand 349 states and 553 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:40,634 INFO L93 Difference]: Finished difference Result 493 states and 776 transitions. [2022-11-02 20:43:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:40,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:43:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:40,638 INFO L225 Difference]: With dead ends: 493 [2022-11-02 20:43:40,638 INFO L226 Difference]: Without dead ends: 493 [2022-11-02 20:43:40,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:40,639 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:40,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:43:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-02 20:43:40,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 477. [2022-11-02 20:43:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 420 states have (on average 1.6547619047619047) internal successors, (695), 451 states have internal predecessors, (695), 15 states have call successors, (15), 10 states have call predecessors, (15), 19 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2022-11-02 20:43:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 774 transitions. [2022-11-02 20:43:40,663 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 774 transitions. Word has length 18 [2022-11-02 20:43:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:40,664 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 774 transitions. [2022-11-02 20:43:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 774 transitions. [2022-11-02 20:43:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:43:40,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:40,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:40,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:40,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:40,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2022-11-02 20:43:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:40,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84117891] [2022-11-02 20:43:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:40,890 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:40,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:43:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:43:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:41,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:41,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:41,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84117891] [2022-11-02 20:43:41,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84117891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:41,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:41,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:43:41,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672022413] [2022-11-02 20:43:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:41,083 INFO L87 Difference]: Start difference. First operand 477 states and 774 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:41,138 INFO L93 Difference]: Finished difference Result 523 states and 806 transitions. [2022-11-02 20:43:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-02 20:43:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:41,142 INFO L225 Difference]: With dead ends: 523 [2022-11-02 20:43:41,142 INFO L226 Difference]: Without dead ends: 523 [2022-11-02 20:43:41,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:41,143 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:41,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 120 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:43:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-02 20:43:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 506. [2022-11-02 20:43:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6322869955156951) internal successors, (728), 479 states have internal predecessors, (728), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2022-11-02 20:43:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2022-11-02 20:43:41,163 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 18 [2022-11-02 20:43:41,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:41,164 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2022-11-02 20:43:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:41,164 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2022-11-02 20:43:41,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-02 20:43:41,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:41,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:41,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:41,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:41,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2022-11-02 20:43:41,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805814653] [2022-11-02 20:43:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:41,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:41,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:41,381 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:43:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:43:41,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:41,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:41,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:41,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805814653] [2022-11-02 20:43:41,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805814653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:41,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:41,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:43:41,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318042043] [2022-11-02 20:43:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:41,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:41,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:41,586 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:41,660 INFO L93 Difference]: Finished difference Result 521 states and 801 transitions. [2022-11-02 20:43:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-02 20:43:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:41,664 INFO L225 Difference]: With dead ends: 521 [2022-11-02 20:43:41,664 INFO L226 Difference]: Without dead ends: 521 [2022-11-02 20:43:41,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:41,665 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:41,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:43:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-02 20:43:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 506. [2022-11-02 20:43:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6233183856502242) internal successors, (724), 479 states have internal predecessors, (724), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2022-11-02 20:43:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 797 transitions. [2022-11-02 20:43:41,687 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 797 transitions. Word has length 19 [2022-11-02 20:43:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:41,688 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 797 transitions. [2022-11-02 20:43:41,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 797 transitions. [2022-11-02 20:43:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:43:41,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:41,690 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-02 20:43:41,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:41,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:41,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1621609206, now seen corresponding path program 2 times [2022-11-02 20:43:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:41,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820876904] [2022-11-02 20:43:41,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:43:41,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:41,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:41,916 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:41,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:43:42,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:43:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:43:42,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:42,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:43,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820876904] [2022-11-02 20:43:43,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820876904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:43:43,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:43,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-02 20:43:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224447649] [2022-11-02 20:43:43,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:43:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:43:43,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:43:43,730 INFO L87 Difference]: Start difference. First operand 506 states and 797 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:47,755 INFO L93 Difference]: Finished difference Result 838 states and 1226 transitions. [2022-11-02 20:43:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:43:47,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-02 20:43:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:47,767 INFO L225 Difference]: With dead ends: 838 [2022-11-02 20:43:47,767 INFO L226 Difference]: Without dead ends: 838 [2022-11-02 20:43:47,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:43:47,768 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 302 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:47,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 604 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-02 20:43:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-11-02 20:43:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 556. [2022-11-02 20:43:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 493 states have (on average 1.6470588235294117) internal successors, (812), 529 states have internal predecessors, (812), 15 states have call successors, (15), 11 states have call predecessors, (15), 25 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2022-11-02 20:43:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 882 transitions. [2022-11-02 20:43:47,799 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 882 transitions. Word has length 22 [2022-11-02 20:43:47,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:47,800 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 882 transitions. [2022-11-02 20:43:47,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:43:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 882 transitions. [2022-11-02 20:43:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:43:47,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:47,803 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:47,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:48,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:48,016 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:48,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2022-11-02 20:43:48,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:48,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323757583] [2022-11-02 20:43:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:48,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:48,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:48,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:43:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:48,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:43:48,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:48,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:48,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323757583] [2022-11-02 20:43:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323757583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:48,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:43:48,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:43:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493299658] [2022-11-02 20:43:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:48,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:43:48,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:43:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:48,139 INFO L87 Difference]: Start difference. First operand 556 states and 882 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:43:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:48,149 INFO L93 Difference]: Finished difference Result 400 states and 619 transitions. [2022-11-02 20:43:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:43:48,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-02 20:43:48,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:48,152 INFO L225 Difference]: With dead ends: 400 [2022-11-02 20:43:48,153 INFO L226 Difference]: Without dead ends: 400 [2022-11-02 20:43:48,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:43:48,154 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 13 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:48,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:43:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-02 20:43:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-02 20:43:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 349 states have (on average 1.6389684813753582) internal successors, (572), 380 states have internal predecessors, (572), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-02 20:43:48,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 619 transitions. [2022-11-02 20:43:48,172 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 619 transitions. Word has length 25 [2022-11-02 20:43:48,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:48,173 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 619 transitions. [2022-11-02 20:43:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:43:48,173 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 619 transitions. [2022-11-02 20:43:48,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:43:48,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:48,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:48,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:43:48,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:43:48,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2022-11-02 20:43:48,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:43:48,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311605309] [2022-11-02 20:43:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:48,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:43:48,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:43:48,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:43:48,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:43:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:43:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:50,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:43:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:51,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:53,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:43:53,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311605309] [2022-11-02 20:43:53,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311605309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:53,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1580773100] [2022-11-02 20:43:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:53,847 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:43:53,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:43:53,850 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:43:53,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-02 20:43:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:43:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:56,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:56,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:43:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:56,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:58,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1580773100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:58,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:58,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-02 20:43:58,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714207689] [2022-11-02 20:43:58,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:58,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:43:58,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:43:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:43:58,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-11-02 20:43:58,396 INFO L87 Difference]: Start difference. First operand 400 states and 619 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:02,982 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2022-11-02 20:44:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:44:02,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-02 20:44:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:02,986 INFO L225 Difference]: With dead ends: 697 [2022-11-02 20:44:02,986 INFO L226 Difference]: Without dead ends: 697 [2022-11-02 20:44:02,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=74, Invalid=163, Unknown=3, NotChecked=0, Total=240 [2022-11-02 20:44:02,987 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 220 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:02,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 273 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-11-02 20:44:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-11-02 20:44:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 607. [2022-11-02 20:44:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 542 states have (on average 1.5904059040590406) internal successors, (862), 578 states have internal predecessors, (862), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2022-11-02 20:44:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 937 transitions. [2022-11-02 20:44:03,007 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 937 transitions. Word has length 27 [2022-11-02 20:44:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:03,008 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 937 transitions. [2022-11-02 20:44:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 937 transitions. [2022-11-02 20:44:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:44:03,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:03,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:03,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-11-02 20:44:03,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:03,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:03,412 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2022-11-02 20:44:03,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:03,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934633908] [2022-11-02 20:44:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:03,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:03,414 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:03,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:44:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:44:03,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:03,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:03,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:03,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934633908] [2022-11-02 20:44:03,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934633908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:03,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:03,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:03,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560045726] [2022-11-02 20:44:03,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:03,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:44:03,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:44:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:44:03,756 INFO L87 Difference]: Start difference. First operand 607 states and 937 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:04,074 INFO L93 Difference]: Finished difference Result 560 states and 812 transitions. [2022-11-02 20:44:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:44:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-02 20:44:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:04,078 INFO L225 Difference]: With dead ends: 560 [2022-11-02 20:44:04,078 INFO L226 Difference]: Without dead ends: 560 [2022-11-02 20:44:04,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:44:04,079 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:04,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 215 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-02 20:44:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 488. [2022-11-02 20:44:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 432 states have (on average 1.5648148148148149) internal successors, (676), 464 states have internal predecessors, (676), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-02 20:44:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 732 transitions. [2022-11-02 20:44:04,099 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 732 transitions. Word has length 28 [2022-11-02 20:44:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:04,100 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 732 transitions. [2022-11-02 20:44:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 732 transitions. [2022-11-02 20:44:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:44:04,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:04,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:04,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:04,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:04,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:04,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2022-11-02 20:44:04,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:04,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826162929] [2022-11-02 20:44:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:04,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:04,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:04,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:44:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:04,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:44:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:07,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:07,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:44:07,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:44:07,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:44:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:07,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:09,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826162929] [2022-11-02 20:44:09,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826162929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:09,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800565754] [2022-11-02 20:44:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:44:09,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:44:09,691 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:44:09,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-02 20:44:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:44:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:14,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:44:14,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:44:14,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:44:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:14,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:17,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800565754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:17,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:17,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-11-02 20:44:17,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534877250] [2022-11-02 20:44:17,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:17,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:44:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:44:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-11-02 20:44:17,141 INFO L87 Difference]: Start difference. First operand 488 states and 732 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:24,342 INFO L93 Difference]: Finished difference Result 567 states and 795 transitions. [2022-11-02 20:44:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:44:24,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-02 20:44:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:24,346 INFO L225 Difference]: With dead ends: 567 [2022-11-02 20:44:24,346 INFO L226 Difference]: Without dead ends: 567 [2022-11-02 20:44:24,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-11-02 20:44:24,348 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 244 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:24,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 57 Unchecked, 0.7s Time] [2022-11-02 20:44:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-02 20:44:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 489. [2022-11-02 20:44:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 433 states have (on average 1.5588914549653579) internal successors, (675), 465 states have internal predecessors, (675), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-02 20:44:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 731 transitions. [2022-11-02 20:44:24,366 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 731 transitions. Word has length 29 [2022-11-02 20:44:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:24,366 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 731 transitions. [2022-11-02 20:44:24,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 731 transitions. [2022-11-02 20:44:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:44:24,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:24,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:24,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:24,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:24,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:24,798 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2022-11-02 20:44:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:24,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301301217] [2022-11-02 20:44:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:24,801 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:44:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:24,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:44:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:25,131 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 20:44:25,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 20:44:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:25,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:25,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301301217] [2022-11-02 20:44:25,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301301217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:25,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:25,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-11-02 20:44:25,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352596382] [2022-11-02 20:44:25,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:25,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:44:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:44:25,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:44:25,643 INFO L87 Difference]: Start difference. First operand 489 states and 731 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:44:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:26,468 INFO L93 Difference]: Finished difference Result 613 states and 857 transitions. [2022-11-02 20:44:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:44:26,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-02 20:44:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:26,471 INFO L225 Difference]: With dead ends: 613 [2022-11-02 20:44:26,472 INFO L226 Difference]: Without dead ends: 613 [2022-11-02 20:44:26,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:44:26,473 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 417 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:26,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 252 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2022-11-02 20:44:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-02 20:44:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 575. [2022-11-02 20:44:26,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 516 states have (on average 1.494186046511628) internal successors, (771), 549 states have internal predecessors, (771), 13 states have call successors, (13), 12 states have call predecessors, (13), 23 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-11-02 20:44:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 827 transitions. [2022-11-02 20:44:26,495 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 827 transitions. Word has length 30 [2022-11-02 20:44:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:26,495 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 827 transitions. [2022-11-02 20:44:26,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:44:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 827 transitions. [2022-11-02 20:44:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:44:26,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:26,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:26,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:26,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:26,711 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2022-11-02 20:44:26,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672078898] [2022-11-02 20:44:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:26,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:26,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:26,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:26,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:44:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:44:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:29,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:44:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:29,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:29,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672078898] [2022-11-02 20:44:29,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672078898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:29,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1177863035] [2022-11-02 20:44:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:29,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:44:29,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:44:29,769 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:44:29,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-02 20:44:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:44:30,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:32,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:44:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:32,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:32,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1177863035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:32,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:32,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-11-02 20:44:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825971587] [2022-11-02 20:44:32,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:44:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:44:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=100, Unknown=1, NotChecked=0, Total=132 [2022-11-02 20:44:32,737 INFO L87 Difference]: Start difference. First operand 575 states and 827 transitions. Second operand has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:33,751 INFO L93 Difference]: Finished difference Result 735 states and 974 transitions. [2022-11-02 20:44:33,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:44:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-11-02 20:44:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:33,762 INFO L225 Difference]: With dead ends: 735 [2022-11-02 20:44:33,762 INFO L226 Difference]: Without dead ends: 735 [2022-11-02 20:44:33,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2022-11-02 20:44:33,764 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 305 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:33,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 304 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 173 Invalid, 0 Unknown, 87 Unchecked, 0.6s Time] [2022-11-02 20:44:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-02 20:44:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 670. [2022-11-02 20:44:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 608 states have (on average 1.4638157894736843) internal successors, (890), 643 states have internal predecessors, (890), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-02 20:44:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 941 transitions. [2022-11-02 20:44:33,792 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 941 transitions. Word has length 31 [2022-11-02 20:44:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:33,793 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 941 transitions. [2022-11-02 20:44:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 941 transitions. [2022-11-02 20:44:33,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:44:33,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:33,796 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:33,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:34,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:34,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt [2022-11-02 20:44:34,213 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:34,213 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2022-11-02 20:44:34,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:34,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060145875] [2022-11-02 20:44:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:34,215 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:34,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:44:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:34,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:44:34,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:36,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:44:37,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:37,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:42,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:42,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060145875] [2022-11-02 20:44:42,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060145875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:42,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218697411] [2022-11-02 20:44:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:42,543 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 20:44:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 20:44:42,544 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 20:44:42,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-02 20:44:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:44:42,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:45,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:45,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:44:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:45,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:46,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218697411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:46,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:46,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-11-02 20:44:46,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582920638] [2022-11-02 20:44:46,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:46,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:44:46,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:46,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:44:46,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2022-11-02 20:44:46,149 INFO L87 Difference]: Start difference. First operand 670 states and 941 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:51,062 INFO L93 Difference]: Finished difference Result 924 states and 1228 transitions. [2022-11-02 20:44:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:44:51,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-11-02 20:44:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:51,066 INFO L225 Difference]: With dead ends: 924 [2022-11-02 20:44:51,067 INFO L226 Difference]: Without dead ends: 924 [2022-11-02 20:44:51,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=106, Invalid=271, Unknown=3, NotChecked=0, Total=380 [2022-11-02 20:44:51,068 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 320 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:51,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 320 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 190 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2022-11-02 20:44:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-02 20:44:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 757. [2022-11-02 20:44:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 692 states have (on average 1.4609826589595376) internal successors, (1011), 728 states have internal predecessors, (1011), 14 states have call successors, (14), 14 states have call predecessors, (14), 28 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2022-11-02 20:44:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1064 transitions. [2022-11-02 20:44:51,091 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1064 transitions. Word has length 35 [2022-11-02 20:44:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:51,092 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1064 transitions. [2022-11-02 20:44:51,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1064 transitions. [2022-11-02 20:44:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:44:51,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:51,093 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:51,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:51,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:51,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:51,497 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:51,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2022-11-02 20:44:51,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:51,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040602886] [2022-11-02 20:44:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:51,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:51,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:51,499 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:51,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:44:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:44:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:52,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-02 20:44:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:52,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:53,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040602886] [2022-11-02 20:44:53,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040602886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:53,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:53,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-02 20:44:53,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528134141] [2022-11-02 20:44:53,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:53,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:44:53,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:44:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:44:53,258 INFO L87 Difference]: Start difference. First operand 757 states and 1064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:44:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:54,955 INFO L93 Difference]: Finished difference Result 780 states and 1062 transitions. [2022-11-02 20:44:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:44:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-11-02 20:44:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:54,959 INFO L225 Difference]: With dead ends: 780 [2022-11-02 20:44:54,960 INFO L226 Difference]: Without dead ends: 780 [2022-11-02 20:44:54,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:44:54,961 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 314 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:54,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 617 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:44:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-11-02 20:44:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 556. [2022-11-02 20:44:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 505 states have (on average 1.495049504950495) internal successors, (755), 535 states have internal predecessors, (755), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-02 20:44:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 791 transitions. [2022-11-02 20:44:54,980 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 791 transitions. Word has length 36 [2022-11-02 20:44:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:54,980 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 791 transitions. [2022-11-02 20:44:54,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:44:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 791 transitions. [2022-11-02 20:44:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:44:54,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:54,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:54,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:55,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:55,195 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2022-11-02 20:44:55,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:55,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770529827] [2022-11-02 20:44:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:55,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:55,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:55,197 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:55,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:44:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:44:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:55,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:55,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:55,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770529827] [2022-11-02 20:44:55,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770529827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:55,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:55,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-11-02 20:44:55,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355678331] [2022-11-02 20:44:55,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:55,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:44:55,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:55,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:44:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:44:55,523 INFO L87 Difference]: Start difference. First operand 556 states and 791 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:55,573 INFO L93 Difference]: Finished difference Result 566 states and 793 transitions. [2022-11-02 20:44:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:44:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-02 20:44:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:55,578 INFO L225 Difference]: With dead ends: 566 [2022-11-02 20:44:55,578 INFO L226 Difference]: Without dead ends: 566 [2022-11-02 20:44:55,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:55,579 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:55,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-02 20:44:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 552. [2022-11-02 20:44:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 504 states have (on average 1.4742063492063493) internal successors, (743), 531 states have internal predecessors, (743), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-02 20:44:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 779 transitions. [2022-11-02 20:44:55,592 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 779 transitions. Word has length 40 [2022-11-02 20:44:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:55,592 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 779 transitions. [2022-11-02 20:44:55,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 779 transitions. [2022-11-02 20:44:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:44:55,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:55,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:55,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-02 20:44:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:55,806 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2022-11-02 20:44:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:55,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105383097] [2022-11-02 20:44:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:55,807 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:55,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:44:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:44:55,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:56,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:56,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105383097] [2022-11-02 20:44:56,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105383097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:56,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:56,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-02 20:44:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763081226] [2022-11-02 20:44:56,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:44:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:44:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:44:56,394 INFO L87 Difference]: Start difference. First operand 552 states and 779 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:44:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:56,654 INFO L93 Difference]: Finished difference Result 498 states and 677 transitions. [2022-11-02 20:44:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-02 20:44:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:56,658 INFO L225 Difference]: With dead ends: 498 [2022-11-02 20:44:56,658 INFO L226 Difference]: Without dead ends: 498 [2022-11-02 20:44:56,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:44:56,659 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 75 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:56,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 202 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-02 20:44:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 466. [2022-11-02 20:44:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 426 states have (on average 1.4553990610328638) internal successors, (620), 447 states have internal predecessors, (620), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-02 20:44:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 648 transitions. [2022-11-02 20:44:56,671 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 648 transitions. Word has length 41 [2022-11-02 20:44:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:56,672 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 648 transitions. [2022-11-02 20:44:56,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:44:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 648 transitions. [2022-11-02 20:44:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:44:56,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:56,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:56,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-02 20:44:56,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:56,886 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2022-11-02 20:44:56,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:56,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428216748] [2022-11-02 20:44:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:56,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:56,889 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:56,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 20:44:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:57,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:44:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:57,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-02 20:44:57,224 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 20:44:57,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-02 20:44:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:57,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:57,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:57,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428216748] [2022-11-02 20:44:57,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428216748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:57,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:57,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-11-02 20:44:57,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379767495] [2022-11-02 20:44:57,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:57,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:44:57,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:44:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:44:57,472 INFO L87 Difference]: Start difference. First operand 466 states and 648 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:57,734 INFO L93 Difference]: Finished difference Result 493 states and 660 transitions. [2022-11-02 20:44:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:44:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-11-02 20:44:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:57,737 INFO L225 Difference]: With dead ends: 493 [2022-11-02 20:44:57,737 INFO L226 Difference]: Without dead ends: 493 [2022-11-02 20:44:57,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:57,738 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 37 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:57,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-02 20:44:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 474. [2022-11-02 20:44:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 434 states have (on average 1.4377880184331797) internal successors, (624), 455 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-02 20:44:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 652 transitions. [2022-11-02 20:44:57,750 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 652 transitions. Word has length 42 [2022-11-02 20:44:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:57,750 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 652 transitions. [2022-11-02 20:44:57,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 652 transitions. [2022-11-02 20:44:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:44:57,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:57,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:57,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:57,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:57,965 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:57,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2034116786, now seen corresponding path program 1 times [2022-11-02 20:44:57,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:57,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430269098] [2022-11-02 20:44:57,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:57,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:57,967 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:57,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:44:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:44:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:44:58,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:44:58,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:58,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430269098] [2022-11-02 20:44:58,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430269098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:58,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:58,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:44:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930138628] [2022-11-02 20:44:58,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:58,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:44:58,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:58,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:44:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:44:58,279 INFO L87 Difference]: Start difference. First operand 474 states and 652 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:58,474 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2022-11-02 20:44:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:44:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-02 20:44:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:58,478 INFO L225 Difference]: With dead ends: 384 [2022-11-02 20:44:58,478 INFO L226 Difference]: Without dead ends: 384 [2022-11-02 20:44:58,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:44:58,479 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 124 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:58,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 295 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-02 20:44:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 349. [2022-11-02 20:44:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 312 states have (on average 1.3397435897435896) internal successors, (418), 332 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:44:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 442 transitions. [2022-11-02 20:44:58,490 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 442 transitions. Word has length 44 [2022-11-02 20:44:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:58,490 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 442 transitions. [2022-11-02 20:44:58,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 442 transitions. [2022-11-02 20:44:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:44:58,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:58,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:58,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:58,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:58,707 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:58,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1418260067, now seen corresponding path program 1 times [2022-11-02 20:44:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:58,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692708201] [2022-11-02 20:44:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:58,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:58,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:58,710 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:58,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 20:44:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:44:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-02 20:44:58,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:58,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:44:58,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692708201] [2022-11-02 20:44:58,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692708201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:58,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:58,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:58,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707519799] [2022-11-02 20:44:58,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:58,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:44:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:44:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:44:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:58,842 INFO L87 Difference]: Start difference. First operand 349 states and 442 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:58,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:58,846 INFO L93 Difference]: Finished difference Result 323 states and 395 transitions. [2022-11-02 20:44:58,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:44:58,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-02 20:44:58,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:58,848 INFO L225 Difference]: With dead ends: 323 [2022-11-02 20:44:58,848 INFO L226 Difference]: Without dead ends: 323 [2022-11-02 20:44:58,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:44:58,849 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:58,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-02 20:44:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2022-11-02 20:44:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 282 states have (on average 1.2872340425531914) internal successors, (363), 298 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:44:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 387 transitions. [2022-11-02 20:44:58,856 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 387 transitions. Word has length 47 [2022-11-02 20:44:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:58,857 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 387 transitions. [2022-11-02 20:44:58,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:44:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 387 transitions. [2022-11-02 20:44:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:44:58,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:58,858 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:58,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:59,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:44:59,071 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-02 20:44:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2022-11-02 20:44:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:44:59,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437673249] [2022-11-02 20:44:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:59,071 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:44:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:44:59,072 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:44:59,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f4c2f70-6d95-4034-817e-301870ecbb2b/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 20:44:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:44:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:02,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-02 20:45:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-02 20:45:02,156 INFO L328 TraceCheckSpWp]: Computing backward predicates...