./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:53:48,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:53:48,702 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:53:48,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:53:48,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:53:48,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:53:48,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:53:48,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:53:48,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:53:48,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:53:48,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:53:48,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:53:48,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:53:48,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:53:48,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:53:48,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:53:48,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:53:48,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:53:48,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:53:48,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:53:48,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:53:48,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:53:48,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:53:48,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:53:48,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:53:48,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:53:48,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:53:48,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:53:48,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:53:48,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:53:48,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:53:48,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:53:48,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:53:48,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:53:48,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:53:48,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:53:48,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:53:48,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:53:48,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:53:48,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:53:48,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:53:48,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:53:48,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:53:48,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:53:48,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:53:48,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:53:48,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:53:48,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:53:48,826 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:53:48,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:53:48,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:53:48,827 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:53:48,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:53:48,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:53:48,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:53:48,828 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:53:48,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:53:48,829 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:53:48,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:53:48,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:53:48,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:53:48,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:53:48,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:53:48,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:53:48,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:53:48,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:53:48,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:53:48,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:53:48,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:53:48,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:53:48,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:53:48,833 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_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2021-11-07 07:53:49,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:53:49,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:53:49,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:53:49,181 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:53:49,183 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:53:49,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-11-07 07:53:49,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/data/feab59ab1/a67e0afe76394fda815f173b8a614670/FLAG7288c57c7 [2021-11-07 07:53:49,892 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:53:49,892 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-11-07 07:53:49,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/data/feab59ab1/a67e0afe76394fda815f173b8a614670/FLAG7288c57c7 [2021-11-07 07:53:50,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/data/feab59ab1/a67e0afe76394fda815f173b8a614670 [2021-11-07 07:53:50,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:53:50,177 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:53:50,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:53:50,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:53:50,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:53:50,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ce3a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50, skipping insertion in model container [2021-11-07 07:53:50,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:53:50,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:53:50,693 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-11-07 07:53:50,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:53:50,722 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:53:50,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-11-07 07:53:50,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:53:50,822 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:53:50,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50 WrapperNode [2021-11-07 07:53:50,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:53:50,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:53:50,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:53:50,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:53:50,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:53:50,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:53:50,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:53:50,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:53:50,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (1/1) ... [2021-11-07 07:53:50,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:53:50,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:50,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:53:50,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:53:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:53:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:53:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:53:50,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:53:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:53:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-07 07:53:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-07 07:53:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-11-07 07:53:50,989 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2021-11-07 07:53:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2021-11-07 07:53:50,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:53:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:53:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:53:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:53:50,990 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:53:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:53:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:53:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:53:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:53:50,991 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:53:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:53:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:53:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:53:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:53:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:53:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:53:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:53:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:53:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:53:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:53:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:53:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:53:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:53:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:53:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:53:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:53:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:53:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:53:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:53:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:53:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:53:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:53:50,995 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:53:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:53:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:53:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:53:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:53:50,996 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:53:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:53:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:53:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:53:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:53:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:53:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:53:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:53:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:53:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:53:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:53:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:53:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:53:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:53:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:53:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:53:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:53:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:53:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:53:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:53:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:53:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:53:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:53:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:53:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:53:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:53:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 07:53:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:53:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:53:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:53:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:53:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:53:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:53:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:53:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:53:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:53:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:53:51,003 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:53:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:53:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:53:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:53:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:53:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:53:51,004 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:53:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:53:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:53:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:53:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:53:51,005 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:53:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:53:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:53:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:53:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:53:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:53:51,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:53:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:53:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:53:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:53:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:53:51,007 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:53:51,008 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:53:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:53:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:53:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:53:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:53:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:53:51,009 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:53:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:53:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-07 07:53:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-07 07:53:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:53:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:53:51,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:53:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-11-07 07:53:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2021-11-07 07:53:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:53:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:53:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2021-11-07 07:53:51,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:53:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 07:53:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:53:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:53:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:53:51,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:53:51,358 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-07 07:53:51,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:53:51,710 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:53:51,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:53:51 BoogieIcfgContainer [2021-11-07 07:53:51,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:53:51,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:53:51,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:53:51,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:53:51,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:53:50" (1/3) ... [2021-11-07 07:53:51,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c1753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:53:51, skipping insertion in model container [2021-11-07 07:53:51,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:53:50" (2/3) ... [2021-11-07 07:53:51,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c1753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:53:51, skipping insertion in model container [2021-11-07 07:53:51,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:53:51" (3/3) ... [2021-11-07 07:53:51,724 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2021-11-07 07:53:51,730 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:53:51,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2021-11-07 07:53:51,783 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:53:51,791 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:53:51,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-11-07 07:53:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 110 states have internal predecessors, (125), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:53:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:53:51,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:51,825 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:51,825 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2080500654, now seen corresponding path program 1 times [2021-11-07 07:53:51,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:51,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814694332] [2021-11-07 07:53:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:51,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:52,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:52,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:52,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814694332] [2021-11-07 07:53:52,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814694332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:52,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:52,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:53:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217694689] [2021-11-07 07:53:52,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:53:52,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:52,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:53:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:53:52,214 INFO L87 Difference]: Start difference. First operand has 125 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 110 states have internal predecessors, (125), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:52,671 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-07 07:53:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:53:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 07:53:52,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:52,692 INFO L225 Difference]: With dead ends: 140 [2021-11-07 07:53:52,692 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 07:53:52,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:53:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 07:53:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2021-11-07 07:53:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 1.8666666666666667) internal successors, (112), 103 states have internal predecessors, (112), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 07:53:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-11-07 07:53:52,776 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 13 [2021-11-07 07:53:52,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-11-07 07:53:52,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-11-07 07:53:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:53:52,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:52,781 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:53:52,783 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:52,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2080500655, now seen corresponding path program 1 times [2021-11-07 07:53:52,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:52,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054642289] [2021-11-07 07:53:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:52,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:52,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:52,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:52,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054642289] [2021-11-07 07:53:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054642289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:52,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:52,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:53:52,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922446350] [2021-11-07 07:53:52,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:53:52,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:53:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:53:52,972 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:53,317 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2021-11-07 07:53:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:53:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 07:53:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:53,326 INFO L225 Difference]: With dead ends: 131 [2021-11-07 07:53:53,326 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 07:53:53,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:53:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 07:53:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-11-07 07:53:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 100 states have internal predecessors, (109), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 07:53:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-11-07 07:53:53,355 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 13 [2021-11-07 07:53:53,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:53,356 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-11-07 07:53:53,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:53:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-11-07 07:53:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:53:53,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:53,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:53:53,360 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 805126828, now seen corresponding path program 1 times [2021-11-07 07:53:53,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:53,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989632025] [2021-11-07 07:53:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:53,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:53,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:53,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 07:53:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:53,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:53,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989632025] [2021-11-07 07:53:53,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989632025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:53,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:53,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:53:53,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697363401] [2021-11-07 07:53:53,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:53:53,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:53,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:53:53,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:53:53,588 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:53:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:54,153 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-07 07:53:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:53:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 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 20 [2021-11-07 07:53:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:54,156 INFO L225 Difference]: With dead ends: 129 [2021-11-07 07:53:54,156 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 07:53:54,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:53:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 07:53:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2021-11-07 07:53:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 98 states have internal predecessors, (107), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 07:53:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-11-07 07:53:54,166 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 20 [2021-11-07 07:53:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:54,167 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-11-07 07:53:54,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:53:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-11-07 07:53:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:53:54,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:54,169 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:54,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:53:54,169 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash 805126829, now seen corresponding path program 1 times [2021-11-07 07:53:54,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:54,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704166548] [2021-11-07 07:53:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:54,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 07:53:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:54,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:54,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704166548] [2021-11-07 07:53:54,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704166548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:54,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:54,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:53:54,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805380538] [2021-11-07 07:53:54,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:53:54,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:53:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:53:54,337 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:53:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:54,848 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-07 07:53:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:53:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 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 20 [2021-11-07 07:53:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:54,851 INFO L225 Difference]: With dead ends: 127 [2021-11-07 07:53:54,851 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 07:53:54,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:53:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 07:53:54,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-11-07 07:53:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 60 states have (on average 1.75) internal successors, (105), 96 states have internal predecessors, (105), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-07 07:53:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-07 07:53:54,860 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 20 [2021-11-07 07:53:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:54,860 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-07 07:53:54,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:53:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-07 07:53:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:53:54,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:54,862 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:54,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:53:54,863 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_createErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:54,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1858859150, now seen corresponding path program 1 times [2021-11-07 07:53:54,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:54,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013082832] [2021-11-07 07:53:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:54,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:54,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:55,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 07:53:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:55,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:55,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013082832] [2021-11-07 07:53:55,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013082832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:55,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:55,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:53:55,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305644076] [2021-11-07 07:53:55,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:53:55,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:55,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:53:55,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:53:55,036 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:53:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:55,395 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-11-07 07:53:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:53:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-07 07:53:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:55,397 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:53:55,398 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:53:55,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:53:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:53:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2021-11-07 07:53:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 101 states have internal predecessors, (111), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:53:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-07 07:53:55,413 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 23 [2021-11-07 07:53:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:55,413 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-07 07:53:55,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:53:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-07 07:53:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:53:55,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:55,415 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:53:55,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:53:55,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1775503700, now seen corresponding path program 1 times [2021-11-07 07:53:55,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:55,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016462811] [2021-11-07 07:53:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:55,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:55,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:55,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:53:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:55,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-07 07:53:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:55,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:55,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016462811] [2021-11-07 07:53:55,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016462811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:53:55,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:53:55,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:53:55,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081895847] [2021-11-07 07:53:55,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:53:55,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:53:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:53:55,530 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:53:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:55,932 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-11-07 07:53:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:53:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-07 07:53:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:55,934 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:53:55,935 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 07:53:55,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:53:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 07:53:55,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-11-07 07:53:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 101 states have internal predecessors, (110), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:53:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-07 07:53:55,950 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 26 [2021-11-07 07:53:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:55,951 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-07 07:53:55,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:53:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-07 07:53:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:53:55,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:55,956 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:53:55,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:53:55,957 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_createErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash -71067773, now seen corresponding path program 1 times [2021-11-07 07:53:55,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:55,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190734227] [2021-11-07 07:53:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:55,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:56,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 07:53:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:56,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 07:53:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:53:56,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:56,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190734227] [2021-11-07 07:53:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190734227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:56,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623270329] [2021-11-07 07:53:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:56,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:56,297 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:53:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:53:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:56,891 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:53:56,892 INFO L388 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 [2021-11-07 07:53:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:57,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623270329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:57,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:57,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-11-07 07:53:57,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825941964] [2021-11-07 07:53:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:53:57,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:53:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:53:57,042 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:53:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:57,929 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-07 07:53:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:53:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-11-07 07:53:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:57,932 INFO L225 Difference]: With dead ends: 133 [2021-11-07 07:53:57,932 INFO L226 Difference]: Without dead ends: 133 [2021-11-07 07:53:57,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:53:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-07 07:53:57,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-11-07 07:53:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.676923076923077) internal successors, (109), 100 states have internal predecessors, (109), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:53:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-11-07 07:53:57,938 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 38 [2021-11-07 07:53:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:57,939 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-11-07 07:53:57,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:53:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-11-07 07:53:57,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:53:57,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:57,941 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 07:53:57,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:53:58,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:58,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_createErr5REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:53:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:53:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -71067772, now seen corresponding path program 1 times [2021-11-07 07:53:58,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:53:58,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422542435] [2021-11-07 07:53:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:58,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:53:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:53:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:58,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 07:53:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:58,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 07:53:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:53:58,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:53:58,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422542435] [2021-11-07 07:53:58,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422542435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:58,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843200263] [2021-11-07 07:53:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:53:58,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:53:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:53:58,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:53:58,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:53:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:53:58,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:53:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:53:58,667 INFO L388 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 [2021-11-07 07:53:59,001 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-07 07:53:59,003 INFO L388 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 9 [2021-11-07 07:53:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:53:59,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843200263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:53:59,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:53:59,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-07 07:53:59,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546695976] [2021-11-07 07:53:59,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:53:59,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:53:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:53:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:53:59,097 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 07:53:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:59,886 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2021-11-07 07:53:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:53:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-11-07 07:53:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:59,889 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:53:59,889 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:53:59,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:53:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:53:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2021-11-07 07:53:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 99 states have internal predecessors, (108), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:53:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-11-07 07:53:59,895 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 38 [2021-11-07 07:53:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:53:59,896 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-11-07 07:53:59,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 07:53:59,898 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-11-07 07:53:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 07:53:59,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:53:59,901 INFO L513 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1] [2021-11-07 07:53:59,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:00,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:00,121 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:54:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:00,121 INFO L85 PathProgramCache]: Analyzing trace with hash -21021789, now seen corresponding path program 1 times [2021-11-07 07:54:00,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:00,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459755105] [2021-11-07 07:54:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:00,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:00,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:54:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:00,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:54:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:00,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:54:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:00,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-07 07:54:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 07:54:00,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:00,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459755105] [2021-11-07 07:54:00,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459755105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:00,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954248417] [2021-11-07 07:54:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:00,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:00,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:00,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:54:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:00,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:54:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:54:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954248417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:00,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:00,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-07 07:54:00,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79139812] [2021-11-07 07:54:00,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:54:00,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:54:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:54:00,650 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-07 07:54:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:01,036 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2021-11-07 07:54:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:54:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2021-11-07 07:54:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:01,038 INFO L225 Difference]: With dead ends: 138 [2021-11-07 07:54:01,038 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 07:54:01,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:54:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 07:54:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2021-11-07 07:54:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 101 states have internal predecessors, (110), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:54:01,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-07 07:54:01,044 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 41 [2021-11-07 07:54:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-07 07:54:01,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-07 07:54:01,045 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-07 07:54:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:54:01,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:01,046 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-11-07 07:54:01,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:01,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 07:54:01,273 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:54:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1345502860, now seen corresponding path program 2 times [2021-11-07 07:54:01,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:01,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118543613] [2021-11-07 07:54:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:01,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:01,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:54:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:01,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:54:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:01,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:54:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:01,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:54:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:01,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-07 07:54:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:54:01,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:01,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118543613] [2021-11-07 07:54:01,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118543613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:01,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790427062] [2021-11-07 07:54:01,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:54:01,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:01,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:01,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:01,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:54:01,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:54:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:54:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:54:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:54:01,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790427062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:01,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:01,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-11-07 07:54:01,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937309679] [2021-11-07 07:54:01,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:54:01,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:01,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:54:01,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:54:01,971 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 07:54:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:02,384 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-11-07 07:54:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:54:02,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-11-07 07:54:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:02,386 INFO L225 Difference]: With dead ends: 128 [2021-11-07 07:54:02,386 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:54:02,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:54:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:54:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-11-07 07:54:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.626865671641791) internal successors, (109), 101 states have internal predecessors, (109), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-07 07:54:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-11-07 07:54:02,392 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 56 [2021-11-07 07:54:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:02,392 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-11-07 07:54:02,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 07:54:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-11-07 07:54:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 07:54:02,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:02,394 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1] [2021-11-07 07:54:02,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:02,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:54:02,594 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:54:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 451161686, now seen corresponding path program 1 times [2021-11-07 07:54:02,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:02,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579343994] [2021-11-07 07:54:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:02,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:02,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:54:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:02,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:54:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:03,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:54:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:03,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:54:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:03,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:54:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:54:03,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:03,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579343994] [2021-11-07 07:54:03,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579343994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:03,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536524845] [2021-11-07 07:54:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:03,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:03,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:03,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:03,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:54:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:03,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:54:03,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:03,663 INFO L388 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 [2021-11-07 07:54:03,693 INFO L388 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 11 treesize of output 9 [2021-11-07 07:54:04,463 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-11-07 07:54:04,463 INFO L388 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 2 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 07:54:04,824 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-07 07:54:04,825 INFO L388 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 22 treesize of output 27 [2021-11-07 07:54:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:54:04,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536524845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:04,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:04,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-07 07:54:04,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319984457] [2021-11-07 07:54:04,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:54:04,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:04,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:54:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:54:04,907 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 27 states, 25 states have (on average 3.2) internal successors, (80), 22 states have internal predecessors, (80), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 07:54:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:07,611 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2021-11-07 07:54:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:54:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.2) internal successors, (80), 22 states have internal predecessors, (80), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 57 [2021-11-07 07:54:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:07,614 INFO L225 Difference]: With dead ends: 199 [2021-11-07 07:54:07,615 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 07:54:07,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:54:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 07:54:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2021-11-07 07:54:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 92 states have (on average 1.5869565217391304) internal successors, (146), 123 states have internal predecessors, (146), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:54:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2021-11-07 07:54:07,624 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 57 [2021-11-07 07:54:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:07,625 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2021-11-07 07:54:07,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.2) internal successors, (80), 22 states have internal predecessors, (80), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 07:54:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2021-11-07 07:54:07,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 07:54:07,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:07,627 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1] [2021-11-07 07:54:07,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:07,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:07,840 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_appendErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:54:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:07,841 INFO L85 PathProgramCache]: Analyzing trace with hash 451161687, now seen corresponding path program 1 times [2021-11-07 07:54:07,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:07,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812089932] [2021-11-07 07:54:07,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:07,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:54:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:54:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:54:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:54:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:54:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:54:08,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:08,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812089932] [2021-11-07 07:54:08,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812089932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:08,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454782177] [2021-11-07 07:54:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:08,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:08,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:08,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:08,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:54:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:54:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:08,784 INFO L388 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 [2021-11-07 07:54:08,819 INFO L388 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 9 treesize of output 7 [2021-11-07 07:54:09,454 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-07 07:54:09,455 INFO L388 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 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-07 07:54:09,792 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-07 07:54:09,793 INFO L388 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 22 treesize of output 31 [2021-11-07 07:54:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 07:54:09,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454782177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:09,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:09,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-07 07:54:09,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867538870] [2021-11-07 07:54:09,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:54:09,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:54:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:54:09,909 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand has 24 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-07 07:54:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:11,568 INFO L93 Difference]: Finished difference Result 221 states and 243 transitions. [2021-11-07 07:54:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:54:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 57 [2021-11-07 07:54:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:11,571 INFO L225 Difference]: With dead ends: 221 [2021-11-07 07:54:11,571 INFO L226 Difference]: Without dead ends: 221 [2021-11-07 07:54:11,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:54:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-07 07:54:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-11-07 07:54:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.619047619047619) internal successors, (170), 136 states have internal predecessors, (170), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:54:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 192 transitions. [2021-11-07 07:54:11,581 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 192 transitions. Word has length 57 [2021-11-07 07:54:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:11,582 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 192 transitions. [2021-11-07 07:54:11,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-07 07:54:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 192 transitions. [2021-11-07 07:54:11,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 07:54:11,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:11,584 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1] [2021-11-07 07:54:11,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:11,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:54:11,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:54:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:11,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1780288292, now seen corresponding path program 1 times [2021-11-07 07:54:11,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:11,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48892214] [2021-11-07 07:54:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:11,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:11,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:54:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:54:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:12,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:54:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:54:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:54:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 07:54:12,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:12,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48892214] [2021-11-07 07:54:12,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48892214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:12,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155327913] [2021-11-07 07:54:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:12,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:12,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:12,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:54:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:12,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:54:12,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:13,171 INFO L388 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 13 treesize of output 9 [2021-11-07 07:54:19,728 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-07 07:54:19,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 51 treesize of output 47 [2021-11-07 07:54:19,753 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-07 07:54:19,754 INFO L388 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 44 treesize of output 52 [2021-11-07 07:54:20,058 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-07 07:54:20,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 29 [2021-11-07 07:54:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 07:54:20,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155327913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:54:20,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:54:20,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 33 [2021-11-07 07:54:20,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971081124] [2021-11-07 07:54:20,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:54:20,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:54:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1021, Unknown=3, NotChecked=0, Total=1122 [2021-11-07 07:54:20,200 INFO L87 Difference]: Start difference. First operand 155 states and 192 transitions. Second operand has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 07:54:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:54:41,304 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-11-07 07:54:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:54:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2021-11-07 07:54:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:54:41,307 INFO L225 Difference]: With dead ends: 173 [2021-11-07 07:54:41,308 INFO L226 Difference]: Without dead ends: 173 [2021-11-07 07:54:41,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=160, Invalid=1477, Unknown=3, NotChecked=0, Total=1640 [2021-11-07 07:54:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-07 07:54:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2021-11-07 07:54:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 107 states have (on average 1.588785046728972) internal successors, (170), 136 states have internal predecessors, (170), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:54:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 192 transitions. [2021-11-07 07:54:41,318 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 192 transitions. Word has length 61 [2021-11-07 07:54:41,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:54:41,318 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 192 transitions. [2021-11-07 07:54:41,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 07:54:41,319 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 192 transitions. [2021-11-07 07:54:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 07:54:41,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:54:41,320 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1] [2021-11-07 07:54:41,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:54:41,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:54:41,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:54:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:54:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1780288291, now seen corresponding path program 1 times [2021-11-07 07:54:41,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:54:41,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514580284] [2021-11-07 07:54:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:41,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:54:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:41,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:54:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:41,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:54:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:42,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:54:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:54:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:54:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:54:43,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:54:43,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514580284] [2021-11-07 07:54:43,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514580284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:43,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067471338] [2021-11-07 07:54:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:54:43,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:54:43,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:54:43,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:54:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:54:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:54:43,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:54:43,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:54:44,087 INFO L388 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 [2021-11-07 07:54:45,282 INFO L388 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 36 treesize of output 28 [2021-11-07 07:54:45,321 INFO L388 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 18 treesize of output 10 [2021-11-07 07:54:48,203 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (let ((.cse0 (+ node_create_~temp~0.offset 4)) (.cse1 (+ node_create_~temp~0.offset 8))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) node_create_~temp~0.offset)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (< node_create_~temp~0.base |c_#StackHeapBarrier|) (= |c_#length| (store |c_old(#length)| node_create_~temp~0.base 12)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset))))))) is different from true [2021-11-07 07:54:48,528 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-07 07:54:48,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 99 treesize of output 91 [2021-11-07 07:54:48,658 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-07 07:54:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 92 treesize of output 84 [2021-11-07 07:54:48,679 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 07:54:48,679 INFO L388 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 85 treesize of output 85 [2021-11-07 07:54:48,706 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-07 07:54:48,706 INFO L388 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 79 treesize of output 81 [2021-11-07 07:54:49,422 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-07 07:54:49,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 68 [2021-11-07 07:54:49,446 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-07 07:54:49,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 35 [2021-11-07 07:54:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-07 07:54:49,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067471338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:54:49,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:54:49,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2021-11-07 07:54:49,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359026212] [2021-11-07 07:54:49,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:54:49,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:54:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:54:49,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1447, Unknown=1, NotChecked=76, Total=1640 [2021-11-07 07:54:49,822 INFO L87 Difference]: Start difference. First operand 155 states and 192 transitions. Second operand has 41 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 32 states have internal predecessors, (83), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 07:55:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:16,059 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2021-11-07 07:55:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:55:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 32 states have internal predecessors, (83), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2021-11-07 07:55:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:16,062 INFO L225 Difference]: With dead ends: 184 [2021-11-07 07:55:16,062 INFO L226 Difference]: Without dead ends: 184 [2021-11-07 07:55:16,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=266, Invalid=3156, Unknown=4, NotChecked=114, Total=3540 [2021-11-07 07:55:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-07 07:55:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2021-11-07 07:55:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 113 states have (on average 1.5575221238938053) internal successors, (176), 142 states have internal predecessors, (176), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:55:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 198 transitions. [2021-11-07 07:55:16,074 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 198 transitions. Word has length 61 [2021-11-07 07:55:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:16,075 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 198 transitions. [2021-11-07 07:55:16,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 32 states have internal predecessors, (83), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 07:55:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 198 transitions. [2021-11-07 07:55:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:55:16,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:16,077 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:16,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:16,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:55:16,293 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_appendErr13REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:55:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1982666411, now seen corresponding path program 1 times [2021-11-07 07:55:16,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:16,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396738342] [2021-11-07 07:55:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:16,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:55:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:55:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:55:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:55:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:55:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 07:55:16,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:16,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396738342] [2021-11-07 07:55:16,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396738342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:16,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:16,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:55:16,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337772008] [2021-11-07 07:55:16,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:55:16,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:55:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:55:16,686 INFO L87 Difference]: Start difference. First operand 161 states and 198 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:55:17,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:17,752 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-11-07 07:55:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:55:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2021-11-07 07:55:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:17,754 INFO L225 Difference]: With dead ends: 173 [2021-11-07 07:55:17,754 INFO L226 Difference]: Without dead ends: 173 [2021-11-07 07:55:17,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:55:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-07 07:55:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2021-11-07 07:55:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 141 states have internal predecessors, (174), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:55:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 196 transitions. [2021-11-07 07:55:17,790 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 196 transitions. Word has length 64 [2021-11-07 07:55:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:17,791 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 196 transitions. [2021-11-07 07:55:17,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:55:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 196 transitions. [2021-11-07 07:55:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:55:17,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:17,792 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:17,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:55:17,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_appendErr12REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:55:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1982666410, now seen corresponding path program 1 times [2021-11-07 07:55:17,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:17,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867322258] [2021-11-07 07:55:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:17,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:17,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:55:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:17,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:55:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:55:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:17,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:55:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:55:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 07:55:18,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:18,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867322258] [2021-11-07 07:55:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867322258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:18,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:18,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:55:18,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129099890] [2021-11-07 07:55:18,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:55:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:55:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:55:18,081 INFO L87 Difference]: Start difference. First operand 160 states and 196 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:55:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:19,015 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2021-11-07 07:55:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:55:19,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2021-11-07 07:55:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:19,017 INFO L225 Difference]: With dead ends: 172 [2021-11-07 07:55:19,018 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 07:55:19,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:55:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 07:55:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 159. [2021-11-07 07:55:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 113 states have (on average 1.5221238938053097) internal successors, (172), 140 states have internal predecessors, (172), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:55:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 194 transitions. [2021-11-07 07:55:19,026 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 194 transitions. Word has length 64 [2021-11-07 07:55:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:19,027 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 194 transitions. [2021-11-07 07:55:19,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:55:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 194 transitions. [2021-11-07 07:55:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:55:19,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:19,029 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:19,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:55:19,029 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:55:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1726564691, now seen corresponding path program 1 times [2021-11-07 07:55:19,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:19,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312896461] [2021-11-07 07:55:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:19,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:55:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:55:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:55:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:55:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 07:55:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:55:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 07:55:19,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:19,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312896461] [2021-11-07 07:55:19,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312896461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:19,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:19,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 07:55:19,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570544691] [2021-11-07 07:55:19,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:55:19,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:55:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:55:19,587 INFO L87 Difference]: Start difference. First operand 159 states and 194 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:55:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:21,407 INFO L93 Difference]: Finished difference Result 221 states and 273 transitions. [2021-11-07 07:55:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:55:21,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-11-07 07:55:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:21,410 INFO L225 Difference]: With dead ends: 221 [2021-11-07 07:55:21,411 INFO L226 Difference]: Without dead ends: 221 [2021-11-07 07:55:21,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:55:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-07 07:55:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2021-11-07 07:55:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 123 states have (on average 1.4796747967479675) internal successors, (182), 147 states have internal predecessors, (182), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-07 07:55:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 206 transitions. [2021-11-07 07:55:21,422 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 206 transitions. Word has length 64 [2021-11-07 07:55:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:21,423 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 206 transitions. [2021-11-07 07:55:21,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:55:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 206 transitions. [2021-11-07 07:55:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:55:21,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:21,425 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:21,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:55:21,425 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:55:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1726564692, now seen corresponding path program 1 times [2021-11-07 07:55:21,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:21,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287575700] [2021-11-07 07:55:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:21,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:55:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:55:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:55:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:55:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 07:55:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:55:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 07:55:22,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:22,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287575700] [2021-11-07 07:55:22,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287575700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:55:22,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:55:22,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 07:55:22,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737181471] [2021-11-07 07:55:22,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:55:22,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:55:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:55:22,134 INFO L87 Difference]: Start difference. First operand 168 states and 206 transitions. Second operand has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:55:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:23,915 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2021-11-07 07:55:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:55:23,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-11-07 07:55:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:23,918 INFO L225 Difference]: With dead ends: 242 [2021-11-07 07:55:23,918 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 07:55:23,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:55:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 07:55:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2021-11-07 07:55:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 137 states have (on average 1.4598540145985401) internal successors, (200), 161 states have internal predecessors, (200), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-07 07:55:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2021-11-07 07:55:23,928 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 64 [2021-11-07 07:55:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:23,928 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2021-11-07 07:55:23,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 07:55:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2021-11-07 07:55:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:55:23,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:23,930 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:23,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:55:23,931 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:55:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1333169234, now seen corresponding path program 1 times [2021-11-07 07:55:23,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:23,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547605085] [2021-11-07 07:55:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:23,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:24,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:55:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:24,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:55:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:55:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:25,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:55:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:25,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:55:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:27,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:27,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547605085] [2021-11-07 07:55:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547605085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:27,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747006023] [2021-11-07 07:55:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:27,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:27,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:27,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:27,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:55:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 07:55:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:28,488 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:55:28,488 INFO L388 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 [2021-11-07 07:55:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 07:55:28,951 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:55:28,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 52 treesize of output 51 [2021-11-07 07:55:29,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-07 07:55:29,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:55:29,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-07 07:55:29,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400562132] [2021-11-07 07:55:29,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:55:29,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:55:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:55:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:55:29,135 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:55:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:55:47,742 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2021-11-07 07:55:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:55:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 65 [2021-11-07 07:55:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:55:47,745 INFO L225 Difference]: With dead ends: 200 [2021-11-07 07:55:47,745 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 07:55:47,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:55:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 07:55:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2021-11-07 07:55:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.4609929078014185) internal successors, (206), 165 states have internal predecessors, (206), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-07 07:55:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 230 transitions. [2021-11-07 07:55:47,756 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 230 transitions. Word has length 65 [2021-11-07 07:55:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:55:47,757 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 230 transitions. [2021-11-07 07:55:47,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:55:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 230 transitions. [2021-11-07 07:55:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 07:55:47,758 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:55:47,759 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:55:47,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:55:47,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:47,972 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:55:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:55:47,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1333169235, now seen corresponding path program 1 times [2021-11-07 07:55:47,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:55:47,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698210665] [2021-11-07 07:55:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:47,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:55:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:48,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:55:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:48,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:55:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:50,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:55:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:55:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:50,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-07 07:55:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 07:55:52,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:55:52,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698210665] [2021-11-07 07:55:52,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698210665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:55:52,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482816460] [2021-11-07 07:55:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:55:52,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:55:52,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:55:52,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:55:52,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:55:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:55:53,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-07 07:55:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:55:54,872 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:55:54,874 INFO L388 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 [2021-11-07 07:55:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 07:55:55,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 07:55:55,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:55:55,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 54 [2021-11-07 07:55:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:55:55,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 71 [2021-11-07 07:55:57,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:55:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 53 [2021-11-07 07:55:57,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 07:55:57,474 INFO L388 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 44 treesize of output 40 [2021-11-07 07:55:57,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:55:57,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 22 [2021-11-07 07:56:37,571 INFO L354 Elim1Store]: treesize reduction 397, result has 9.2 percent of original size [2021-11-07 07:56:37,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 177 treesize of output 137 [2021-11-07 07:56:37,609 INFO L354 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2021-11-07 07:56:37,609 INFO L388 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 170 treesize of output 165 [2021-11-07 07:56:37,828 INFO L354 Elim1Store]: treesize reduction 541, result has 8.8 percent of original size [2021-11-07 07:56:37,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 164 [2021-11-07 07:56:37,874 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-07 07:56:37,874 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2021-11-07 07:56:40,811 INFO L354 Elim1Store]: treesize reduction 184, result has 1.6 percent of original size [2021-11-07 07:56:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 182 treesize of output 101 [2021-11-07 07:56:40,857 INFO L354 Elim1Store]: treesize reduction 154, result has 1.9 percent of original size [2021-11-07 07:56:40,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 54 [2021-11-07 07:56:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:41,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482816460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:41,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:41,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-11-07 07:56:41,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775581504] [2021-11-07 07:56:41,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:56:41,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:41,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:56:41,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3691, Unknown=14, NotChecked=0, Total=3906 [2021-11-07 07:56:41,272 INFO L87 Difference]: Start difference. First operand 186 states and 230 transitions. Second operand has 63 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 51 states have internal predecessors, (103), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 07:59:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:01,225 INFO L93 Difference]: Finished difference Result 213 states and 258 transitions. [2021-11-07 07:59:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:59:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 51 states have internal predecessors, (103), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2021-11-07 07:59:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:01,228 INFO L225 Difference]: With dead ends: 213 [2021-11-07 07:59:01,228 INFO L226 Difference]: Without dead ends: 213 [2021-11-07 07:59:01,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 90.7s TimeCoverageRelationStatistics Valid=439, Invalid=6848, Unknown=23, NotChecked=0, Total=7310 [2021-11-07 07:59:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-07 07:59:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-11-07 07:59:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.4482758620689655) internal successors, (210), 169 states have internal predecessors, (210), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-07 07:59:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 234 transitions. [2021-11-07 07:59:01,241 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 234 transitions. Word has length 65 [2021-11-07 07:59:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:01,241 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 234 transitions. [2021-11-07 07:59:01,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 51 states have internal predecessors, (103), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 07:59:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 234 transitions. [2021-11-07 07:59:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 07:59:01,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:01,243 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:01,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:01,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:01,457 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:59:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash -439504048, now seen corresponding path program 1 times [2021-11-07 07:59:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:01,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915628457] [2021-11-07 07:59:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:01,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:01,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:59:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:01,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:59:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:01,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:59:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:01,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:59:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:02,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 07:59:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:59:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:59:03,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:03,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915628457] [2021-11-07 07:59:03,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915628457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:03,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280617771] [2021-11-07 07:59:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:03,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:03,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:03,123 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:03,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:59:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:59:03,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:04,385 INFO L388 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 12 treesize of output 8 [2021-11-07 07:59:06,962 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset)))))) is different from true [2021-11-07 07:59:21,028 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) 0) node_create_~temp~0.offset v_DerPreprocessor_1)) |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) |c_dll_append_#t~mem10.base|))) is different from true [2021-11-07 07:59:23,060 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) 0) node_create_~temp~0.offset v_DerPreprocessor_1)) |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) 0) (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|))) is different from true [2021-11-07 07:59:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-07 07:59:23,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280617771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:23,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:23,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2021-11-07 07:59:23,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590437242] [2021-11-07 07:59:23,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:59:23,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:59:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=725, Unknown=8, NotChecked=168, Total=992 [2021-11-07 07:59:23,204 INFO L87 Difference]: Start difference. First operand 190 states and 234 transitions. Second operand has 32 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 07:59:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:50,435 INFO L93 Difference]: Finished difference Result 183 states and 218 transitions. [2021-11-07 07:59:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:59:50,436 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 67 [2021-11-07 07:59:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:50,438 INFO L225 Difference]: With dead ends: 183 [2021-11-07 07:59:50,438 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 07:59:50,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=12, NotChecked=258, Total=2162 [2021-11-07 07:59:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 07:59:50,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 165. [2021-11-07 07:59:50,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.4508196721311475) internal successors, (177), 146 states have internal predecessors, (177), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-07 07:59:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2021-11-07 07:59:50,447 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 67 [2021-11-07 07:59:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:50,448 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2021-11-07 07:59:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 07:59:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2021-11-07 07:59:50,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:59:50,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:50,450 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:50,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:50,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:59:50,677 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:59:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 232427872, now seen corresponding path program 1 times [2021-11-07 07:59:50,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:50,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560164202] [2021-11-07 07:59:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:50,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:51,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:59:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:51,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:59:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:51,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:59:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:51,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 07:59:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:51,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 07:59:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 07:59:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 07:59:53,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:53,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560164202] [2021-11-07 07:59:53,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560164202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:53,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:53,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-07 07:59:53,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352766015] [2021-11-07 07:59:53,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:59:53,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:59:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:59:53,447 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 07:59:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:59,900 INFO L93 Difference]: Finished difference Result 232 states and 284 transitions. [2021-11-07 07:59:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:59:59,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2021-11-07 07:59:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:59,903 INFO L225 Difference]: With dead ends: 232 [2021-11-07 07:59:59,904 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 07:59:59,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:59:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 07:59:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 179. [2021-11-07 07:59:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 134 states have (on average 1.4402985074626866) internal successors, (193), 158 states have internal predecessors, (193), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-07 07:59:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 217 transitions. [2021-11-07 07:59:59,914 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 217 transitions. Word has length 69 [2021-11-07 07:59:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:59,915 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 217 transitions. [2021-11-07 07:59:59,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 07:59:59,916 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 217 transitions. [2021-11-07 07:59:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:59:59,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:59,917 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:59,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 07:59:59,918 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-07 07:59:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:59,918 INFO L85 PathProgramCache]: Analyzing trace with hash 232427873, now seen corresponding path program 1 times [2021-11-07 07:59:59,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:59,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699642059] [2021-11-07 07:59:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:59,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:00,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:00:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:00,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 08:00:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:00,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 08:00:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:00,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-07 08:00:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:00,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 08:00:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:02,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-07 08:00:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:00:04,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:04,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699642059] [2021-11-07 08:00:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699642059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:04,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355664252] [2021-11-07 08:00:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:04,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:04,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:04,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:04,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e80a0a-69a8-46a6-a452-2a990a54c16c/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:00:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:04,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 08:00:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:06,675 INFO L388 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 18 treesize of output 14 [2021-11-07 08:00:06,681 INFO L388 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 11 treesize of output 7 [2021-11-07 08:00:54,849 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_append_~new_last~0.base Int) (dll_append_~last~0.offset Int) (node_create_~temp~0.offset Int) (v_DerPreprocessor_3 Int) (dll_append_~new_last~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_2 Int)) (let ((.cse7 (+ node_create_~temp~0.offset 4)) (.cse8 (+ node_create_~temp~0.offset 8))) (let ((.cse3 (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse7 0) .cse8 0) node_create_~temp~0.offset v_DerPreprocessor_2)))) (let ((.cse2 (+ dll_append_~new_last~0.offset 8)) (.cse0 (select (select .cse3 |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|)) (.cse4 (+ dll_append_~last~0.offset 4)) (.cse6 (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse7 0) .cse8 0) node_create_~temp~0.offset v_DerPreprocessor_3)))) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (<= (+ dll_append_~last~0.offset 8) (select |c_#length| .cse0)) (<= dll_append_~new_last~0.base node_create_~temp~0.base) (= (let ((.cse1 (store .cse3 .cse0 (store (select .cse3 .cse0) .cse4 dll_append_~new_last~0.base)))) (store .cse1 dll_append_~new_last~0.base (store (select .cse1 dll_append_~new_last~0.base) .cse2 .cse0))) |c_#memory_$Pointer$.base|) (= (let ((.cse5 (store .cse6 .cse0 (store (select .cse6 .cse0) .cse4 dll_append_~new_last~0.offset)))) (store .cse5 dll_append_~new_last~0.base (store (select .cse5 dll_append_~new_last~0.base) .cse2 dll_append_~last~0.offset))) |c_#memory_$Pointer$.offset|) (<= (select (select .cse6 |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) dll_append_~last~0.offset)))))) is different from true [2021-11-07 08:01:01,400 WARN L207 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 227 DAG size of output: 91 [2021-11-07 08:01:01,401 INFO L354 Elim1Store]: treesize reduction 1696, result has 13.2 percent of original size [2021-11-07 08:01:01,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 2240 treesize of output 1667 [2021-11-07 08:01:03,387 INFO L354 Elim1Store]: treesize reduction 2137, result has 17.9 percent of original size [2021-11-07 08:01:03,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 15 case distinctions, treesize of input 2526 treesize of output 1903 [2021-11-07 08:01:23,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:01:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:01:23,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:01:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:01:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:01:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:01:23,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 08:01:23,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 148 treesize of output 242