./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX --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 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:30:40,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:30:40,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:30:40,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:30:40,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:30:40,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:30:40,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:30:40,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:30:40,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:30:40,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:30:40,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:30:40,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:30:40,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:30:40,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:30:40,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:30:40,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:30:40,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:30:40,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:30:40,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:30:40,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:30:40,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:30:40,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:30:40,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:30:40,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:30:40,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:30:40,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:30:40,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:30:40,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:30:40,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:30:40,774 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:30:40,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:30:40,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:30:40,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:30:40,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:30:40,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:30:40,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:30:40,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:30:40,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:30:40,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:30:40,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:30:40,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:30:40,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 08:30:40,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:30:40,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:30:40,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:30:40,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:30:40,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:30:40,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:30:40,828 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:30:40,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:30:40,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:30:40,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:30:40,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:30:40,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:30:40,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:30:40,831 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:30:40,831 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:30:40,832 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:30:40,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:30:40,832 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:30:40,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:30:40,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:30:40,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:30:40,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:30:40,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:30:40,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:40,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:30:40,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:30:40,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:30:40,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:30:40,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:30:40,836 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_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 535caea86e22f289c2fcb0364594f5e7b1dfaabfa814e56099346e6a240c0067 [2021-11-09 08:30:41,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:30:41,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:30:41,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:30:41,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:30:41,179 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:30:41,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2021-11-09 08:30:41,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/data/aada96393/8e6acd26b2c84bfb9222601af6f8a4de/FLAGc1102d420 [2021-11-09 08:30:41,793 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:30:41,793 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/sv-benchmarks/c/list-simple/dll2c_insert_equal.i [2021-11-09 08:30:41,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/data/aada96393/8e6acd26b2c84bfb9222601af6f8a4de/FLAGc1102d420 [2021-11-09 08:30:42,073 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/data/aada96393/8e6acd26b2c84bfb9222601af6f8a4de [2021-11-09 08:30:42,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:30:42,077 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:30:42,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:42,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:30:42,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:30:42,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32d44bf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42, skipping insertion in model container [2021-11-09 08:30:42,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:30:42,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:30:42,540 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_b3731a17-bab1-47d7-a873-eb0047736769/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2021-11-09 08:30:42,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:42,557 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:30:42,621 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_b3731a17-bab1-47d7-a873-eb0047736769/sv-benchmarks/c/list-simple/dll2c_insert_equal.i[24877,24890] [2021-11-09 08:30:42,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:30:42,665 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:30:42,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42 WrapperNode [2021-11-09 08:30:42,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:30:42,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:30:42,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:30:42,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:30:42,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:30:42,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:30:42,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:30:42,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:30:42,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (1/1) ... [2021-11-09 08:30:42,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:30:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:42,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:30:42,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:30:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 08:30:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:30:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 08:30:42,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 08:30:42,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 08:30:42,928 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-09 08:30:42,928 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-09 08:30:42,928 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-11-09 08:30:42,928 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2021-11-09 08:30:42,929 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_insert [2021-11-09 08:30:42,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 08:30:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 08:30:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 08:30:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 08:30:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 08:30:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 08:30:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 08:30:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 08:30:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 08:30:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 08:30:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 08:30:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 08:30:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 08:30:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 08:30:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 08:30:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 08:30:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 08:30:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 08:30:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 08:30:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 08:30:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 08:30:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 08:30:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 08:30:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 08:30:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 08:30:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 08:30:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 08:30:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 08:30:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 08:30:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 08:30:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 08:30:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 08:30:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 08:30:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 08:30:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 08:30:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 08:30:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-09 08:30:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 08:30:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 08:30:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 08:30:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 08:30:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 08:30:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 08:30:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 08:30:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 08:30:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 08:30:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 08:30:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 08:30:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 08:30:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 08:30:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 08:30:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 08:30:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 08:30:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 08:30:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 08:30:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 08:30:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 08:30:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 08:30:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 08:30:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 08:30:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 08:30:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 08:30:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 08:30:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 08:30:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 08:30:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 08:30:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 08:30:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 08:30:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 08:30:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 08:30:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 08:30:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 08:30:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 08:30:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 08:30:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 08:30:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 08:30:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 08:30:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 08:30:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 08:30:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 08:30:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 08:30:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:30:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:30:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-11-09 08:30:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2021-11-09 08:30:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:30:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:30:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_insert [2021-11-09 08:30:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 08:30:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 08:30:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:30:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 08:30:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:30:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:30:43,427 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-09 08:30:43,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:30:43,810 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 08:30:43,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:43 BoogieIcfgContainer [2021-11-09 08:30:43,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:30:43,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:30:43,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:30:43,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:30:43,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:30:42" (1/3) ... [2021-11-09 08:30:43,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4871976d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:43, skipping insertion in model container [2021-11-09 08:30:43,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:30:42" (2/3) ... [2021-11-09 08:30:43,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4871976d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:30:43, skipping insertion in model container [2021-11-09 08:30:43,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:30:43" (3/3) ... [2021-11-09 08:30:43,824 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_insert_equal.i [2021-11-09 08:30:43,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:30:43,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-11-09 08:30:43,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:30:43,906 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 [2021-11-09 08:30:43,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-11-09 08:30:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 155 states have internal predecessors, (170), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:30:43,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:43,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:43,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 799923189, now seen corresponding path program 1 times [2021-11-09 08:30:43,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:43,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930736124] [2021-11-09 08:30:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:43,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:44,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:44,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930736124] [2021-11-09 08:30:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930736124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:44,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:44,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:44,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748392272] [2021-11-09 08:30:44,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:44,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:44,195 INFO L87 Difference]: Start difference. First operand has 171 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 155 states have internal predecessors, (170), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-09 08:30:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:44,636 INFO L93 Difference]: Finished difference Result 187 states and 199 transitions. [2021-11-09 08:30:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12 [2021-11-09 08:30:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:44,654 INFO L225 Difference]: With dead ends: 187 [2021-11-09 08:30:44,654 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 08:30:44,657 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 [2021-11-09 08:30:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 08:30:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2021-11-09 08:30:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 80 states have (on average 1.9625) internal successors, (157), 148 states have internal predecessors, (157), 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) [2021-11-09 08:30:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 172 transitions. [2021-11-09 08:30:44,704 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 172 transitions. Word has length 12 [2021-11-09 08:30:44,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:44,704 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 172 transitions. [2021-11-09 08:30:44,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-09 08:30:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 172 transitions. [2021-11-09 08:30:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:30:44,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:44,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:44,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:30:44,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:44,707 INFO L85 PathProgramCache]: Analyzing trace with hash 799923190, now seen corresponding path program 1 times [2021-11-09 08:30:44,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:44,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232528465] [2021-11-09 08:30:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:44,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:44,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:44,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232528465] [2021-11-09 08:30:44,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232528465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:44,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:44,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:30:44,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535503121] [2021-11-09 08:30:44,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:44,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:44,834 INFO L87 Difference]: Start difference. First operand 162 states and 172 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-09 08:30:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:45,209 INFO L93 Difference]: Finished difference Result 178 states and 189 transitions. [2021-11-09 08:30:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12 [2021-11-09 08:30:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:45,216 INFO L225 Difference]: With dead ends: 178 [2021-11-09 08:30:45,223 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 08:30:45,224 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 [2021-11-09 08:30:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 08:30:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2021-11-09 08:30:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 80 states have (on average 1.925) internal successors, (154), 145 states have internal predecessors, (154), 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) [2021-11-09 08:30:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2021-11-09 08:30:45,247 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 12 [2021-11-09 08:30:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:45,247 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2021-11-09 08:30:45,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-09 08:30:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2021-11-09 08:30:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 08:30:45,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:45,249 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] [2021-11-09 08:30:45,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:30:45,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1129362281, now seen corresponding path program 1 times [2021-11-09 08:30:45,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:45,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231631293] [2021-11-09 08:30:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:45,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:45,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:45,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:45,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231631293] [2021-11-09 08:30:45,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231631293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:45,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:45,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:30:45,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550588112] [2021-11-09 08:30:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:30:45,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:30:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:45,494 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:30:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:46,018 INFO L93 Difference]: Finished difference Result 189 states and 202 transitions. [2021-11-09 08:30:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:46,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 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 20 [2021-11-09 08:30:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:46,020 INFO L225 Difference]: With dead ends: 189 [2021-11-09 08:30:46,021 INFO L226 Difference]: Without dead ends: 189 [2021-11-09 08:30:46,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-09 08:30:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 160. [2021-11-09 08:30:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 81 states have (on average 1.9135802469135803) internal successors, (155), 146 states have internal predecessors, (155), 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) [2021-11-09 08:30:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-11-09 08:30:46,036 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 20 [2021-11-09 08:30:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:46,037 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-11-09 08:30:46,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:30:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-11-09 08:30:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:30:46,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:46,038 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] [2021-11-09 08:30:46,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:30:46,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:46,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 492369722, now seen corresponding path program 1 times [2021-11-09 08:30:46,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:46,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471930255] [2021-11-09 08:30:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:46,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:30:46,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:46,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471930255] [2021-11-09 08:30:46,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471930255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:46,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:46,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:30:46,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436981178] [2021-11-09 08:30:46,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:30:46,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:30:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:46,176 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:46,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:46,740 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2021-11-09 08:30:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:30:46,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-09 08:30:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:46,742 INFO L225 Difference]: With dead ends: 179 [2021-11-09 08:30:46,743 INFO L226 Difference]: Without dead ends: 179 [2021-11-09 08:30:46,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-09 08:30:46,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2021-11-09 08:30:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 81 states have (on average 1.9012345679012346) internal successors, (154), 145 states have internal predecessors, (154), 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) [2021-11-09 08:30:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 169 transitions. [2021-11-09 08:30:46,759 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 169 transitions. Word has length 30 [2021-11-09 08:30:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:46,760 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 169 transitions. [2021-11-09 08:30:46,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 169 transitions. [2021-11-09 08:30:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:30:46,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:46,761 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] [2021-11-09 08:30:46,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:30:46,762 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:46,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash 492369723, now seen corresponding path program 1 times [2021-11-09 08:30:46,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:46,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245334134] [2021-11-09 08:30:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:46,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:46,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:46,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245334134] [2021-11-09 08:30:46,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245334134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:46,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:46,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:30:46,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135268541] [2021-11-09 08:30:46,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:30:46,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:46,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:30:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:46,998 INFO L87 Difference]: Start difference. First operand 159 states and 169 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:47,559 INFO L93 Difference]: Finished difference Result 178 states and 190 transitions. [2021-11-09 08:30:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:30:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2021-11-09 08:30:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:47,561 INFO L225 Difference]: With dead ends: 178 [2021-11-09 08:30:47,561 INFO L226 Difference]: Without dead ends: 178 [2021-11-09 08:30:47,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-09 08:30:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 158. [2021-11-09 08:30:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 81 states have (on average 1.8888888888888888) internal successors, (153), 144 states have internal predecessors, (153), 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) [2021-11-09 08:30:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2021-11-09 08:30:47,568 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 30 [2021-11-09 08:30:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:47,569 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2021-11-09 08:30:47,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2021-11-09 08:30:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:30:47,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:47,570 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] [2021-11-09 08:30:47,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:30:47,570 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:47,571 INFO L85 PathProgramCache]: Analyzing trace with hash 720900155, now seen corresponding path program 1 times [2021-11-09 08:30:47,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:47,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389881514] [2021-11-09 08:30:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:47,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:47,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389881514] [2021-11-09 08:30:47,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389881514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:47,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768230707] [2021-11-09 08:30:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:47,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:47,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:47,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:30:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 08:30:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:48,135 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 [2021-11-09 08:30:48,426 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:30:48,426 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 17 treesize of output 21 [2021-11-09 08:30:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:48,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768230707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:48,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:48,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-09 08:30:48,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067527124] [2021-11-09 08:30:48,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:30:48,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:48,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:30:48,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:30:48,561 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 08:30:49,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:49,443 INFO L93 Difference]: Finished difference Result 185 states and 198 transitions. [2021-11-09 08:30:49,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 08:30:49,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-09 08:30:49,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:49,446 INFO L225 Difference]: With dead ends: 185 [2021-11-09 08:30:49,446 INFO L226 Difference]: Without dead ends: 185 [2021-11-09 08:30:49,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:30:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-09 08:30:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2021-11-09 08:30:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 148 states have internal predecessors, (159), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 176 transitions. [2021-11-09 08:30:49,453 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 176 transitions. Word has length 32 [2021-11-09 08:30:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:49,454 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 176 transitions. [2021-11-09 08:30:49,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 08:30:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 176 transitions. [2021-11-09 08:30:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 08:30:49,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:49,455 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] [2021-11-09 08:30:49,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:49,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:49,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:49,657 INFO L85 PathProgramCache]: Analyzing trace with hash 720900156, now seen corresponding path program 1 times [2021-11-09 08:30:49,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:49,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806448217] [2021-11-09 08:30:49,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:49,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:49,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:49,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:49,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806448217] [2021-11-09 08:30:49,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806448217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:49,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729946463] [2021-11-09 08:30:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:50,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:50,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:50,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:50,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:30:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:30:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:50,201 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 [2021-11-09 08:30:50,206 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 [2021-11-09 08:30:50,551 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:30:50,552 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 22 treesize of output 24 [2021-11-09 08:30:50,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:30:50,560 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 21 treesize of output 21 [2021-11-09 08:30:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:50,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729946463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:50,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2021-11-09 08:30:50,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862993694] [2021-11-09 08:30:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:30:50,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:50,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:30:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:50,651 INFO L87 Difference]: Start difference. First operand 163 states and 176 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 08:30:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:51,637 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2021-11-09 08:30:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 08:30:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-09 08:30:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:51,640 INFO L225 Difference]: With dead ends: 184 [2021-11-09 08:30:51,640 INFO L226 Difference]: Without dead ends: 184 [2021-11-09 08:30:51,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:30:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-09 08:30:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 163. [2021-11-09 08:30:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 85 states have (on average 1.8588235294117648) internal successors, (158), 148 states have internal predecessors, (158), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 175 transitions. [2021-11-09 08:30:51,650 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 175 transitions. Word has length 32 [2021-11-09 08:30:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:51,650 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 175 transitions. [2021-11-09 08:30:51,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 08:30:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 175 transitions. [2021-11-09 08:30:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:30:51,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:51,654 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] [2021-11-09 08:30:51,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:51,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:51,868 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1295468593, now seen corresponding path program 1 times [2021-11-09 08:30:51,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:51,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69812839] [2021-11-09 08:30:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:51,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:51,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:51,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69812839] [2021-11-09 08:30:51,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69812839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:51,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475502819] [2021-11-09 08:30:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:51,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:51,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:52,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:30:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 08:30:52,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:52,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475502819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:52,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:52,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-11-09 08:30:52,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639563165] [2021-11-09 08:30:52,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:30:52,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:30:52,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:52,346 INFO L87 Difference]: Start difference. First operand 163 states and 175 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:30:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:52,756 INFO L93 Difference]: Finished difference Result 183 states and 195 transitions. [2021-11-09 08:30:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:30:52,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-09 08:30:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:52,758 INFO L225 Difference]: With dead ends: 183 [2021-11-09 08:30:52,759 INFO L226 Difference]: Without dead ends: 183 [2021-11-09 08:30:52,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-09 08:30:52,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 163. [2021-11-09 08:30:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 85 states have (on average 1.8470588235294119) internal successors, (157), 148 states have internal predecessors, (157), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2021-11-09 08:30:52,765 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 34 [2021-11-09 08:30:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:52,765 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2021-11-09 08:30:52,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:30:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2021-11-09 08:30:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:30:52,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:52,767 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] [2021-11-09 08:30:52,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:52,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:30:52,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1500040061, now seen corresponding path program 1 times [2021-11-09 08:30:52,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:52,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106826205] [2021-11-09 08:30:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:52,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:30:53,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:53,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106826205] [2021-11-09 08:30:53,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106826205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806366544] [2021-11-09 08:30:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:53,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:53,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:53,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:30:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:30:53,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:30:53,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806366544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:53,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:53,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 6 [2021-11-09 08:30:53,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161694895] [2021-11-09 08:30:53,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:30:53,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:53,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:30:53,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:30:53,386 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 08:30:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:53,806 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2021-11-09 08:30:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:30:53,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-09 08:30:53,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:53,808 INFO L225 Difference]: With dead ends: 187 [2021-11-09 08:30:53,809 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 08:30:53,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:30:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 08:30:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 166. [2021-11-09 08:30:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 88 states have (on average 1.8409090909090908) internal successors, (162), 151 states have internal predecessors, (162), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2021-11-09 08:30:53,824 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 35 [2021-11-09 08:30:53,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:53,827 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2021-11-09 08:30:53,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-09 08:30:53,827 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2021-11-09 08:30:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:30:53,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:53,830 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] [2021-11-09 08:30:53,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:54,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,056 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1500040062, now seen corresponding path program 1 times [2021-11-09 08:30:54,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:54,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513774329] [2021-11-09 08:30:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:54,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:54,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:54,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:54,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513774329] [2021-11-09 08:30:54,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513774329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:54,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568054922] [2021-11-09 08:30:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:54,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:54,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:54,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:30:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 08:30:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:54,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568054922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:54,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:54,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-09 08:30:54,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680973942] [2021-11-09 08:30:54,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:30:54,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:30:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:30:54,722 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:30:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:55,374 INFO L93 Difference]: Finished difference Result 192 states and 206 transitions. [2021-11-09 08:30:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:30:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-11-09 08:30:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:55,377 INFO L225 Difference]: With dead ends: 192 [2021-11-09 08:30:55,377 INFO L226 Difference]: Without dead ends: 192 [2021-11-09 08:30:55,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:30:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-09 08:30:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 166. [2021-11-09 08:30:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 151 states have internal predecessors, (161), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 178 transitions. [2021-11-09 08:30:55,387 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 178 transitions. Word has length 35 [2021-11-09 08:30:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:55,387 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 178 transitions. [2021-11-09 08:30:55,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 11 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:30:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 178 transitions. [2021-11-09 08:30:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:30:55,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:55,390 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] [2021-11-09 08:30:55,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-09 08:30:55,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:30:55,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_circular_createErr6REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:55,613 INFO L85 PathProgramCache]: Analyzing trace with hash -743398355, now seen corresponding path program 1 times [2021-11-09 08:30:55,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:55,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348971043] [2021-11-09 08:30:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:55,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:55,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:55,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:55,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:30:55,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:55,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348971043] [2021-11-09 08:30:55,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348971043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:55,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:55,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:30:55,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085688281] [2021-11-09 08:30:55,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:30:55,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:30:55,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:55,744 INFO L87 Difference]: Start difference. First operand 166 states and 178 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:56,286 INFO L93 Difference]: Finished difference Result 185 states and 198 transitions. [2021-11-09 08:30:56,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:56,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-09 08:30:56,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:56,288 INFO L225 Difference]: With dead ends: 185 [2021-11-09 08:30:56,288 INFO L226 Difference]: Without dead ends: 185 [2021-11-09 08:30:56,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:30:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-09 08:30:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2021-11-09 08:30:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 88 states have (on average 1.8181818181818181) internal successors, (160), 150 states have internal predecessors, (160), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-11-09 08:30:56,295 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 36 [2021-11-09 08:30:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:56,295 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-11-09 08:30:56,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-11-09 08:30:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:30:56,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:56,297 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] [2021-11-09 08:30:56,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:30:56,297 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash -743398354, now seen corresponding path program 1 times [2021-11-09 08:30:56,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:56,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860916047] [2021-11-09 08:30:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:56,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:56,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:56,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:30:56,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:56,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860916047] [2021-11-09 08:30:56,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860916047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:56,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:56,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:30:56,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685194551] [2021-11-09 08:30:56,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:30:56,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:30:56,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:30:56,440 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:56,982 INFO L93 Difference]: Finished difference Result 183 states and 196 transitions. [2021-11-09 08:30:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:56,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-11-09 08:30:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:56,984 INFO L225 Difference]: With dead ends: 183 [2021-11-09 08:30:56,984 INFO L226 Difference]: Without dead ends: 183 [2021-11-09 08:30:56,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:30:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-09 08:30:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 164. [2021-11-09 08:30:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 88 states have (on average 1.8068181818181819) internal successors, (159), 149 states have internal predecessors, (159), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 08:30:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2021-11-09 08:30:56,991 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 36 [2021-11-09 08:30:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:56,991 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2021-11-09 08:30:56,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:30:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2021-11-09 08:30:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:30:56,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:56,993 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:56,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:30:56,993 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_circular_createErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1092380193, now seen corresponding path program 1 times [2021-11-09 08:30:56,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:56,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477035575] [2021-11-09 08:30:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:56,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 08:30:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-09 08:30:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-09 08:30:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-09 08:30:57,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:57,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477035575] [2021-11-09 08:30:57,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477035575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:57,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646532735] [2021-11-09 08:30:57,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:57,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:57,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:57,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:30:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:57,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:30:57,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646532735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:57,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:30:57,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-09 08:30:57,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813642448] [2021-11-09 08:30:57,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:30:57,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:30:57,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:30:57,503 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 08:30:57,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:57,537 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2021-11-09 08:30:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:30:57,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2021-11-09 08:30:57,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:57,539 INFO L225 Difference]: With dead ends: 152 [2021-11-09 08:30:57,540 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 08:30:57,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:30:57,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 08:30:57,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-09 08:30:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 81 states have (on average 1.7901234567901234) internal successors, (145), 138 states have internal predecessors, (145), 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) [2021-11-09 08:30:57,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2021-11-09 08:30:57,546 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 47 [2021-11-09 08:30:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:57,546 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2021-11-09 08:30:57,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 08:30:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2021-11-09 08:30:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:30:57,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:57,548 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:30:57,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:57,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 08:30:57,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_circular_insertErr0REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:30:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:57,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1164436710, now seen corresponding path program 1 times [2021-11-09 08:30:57,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:30:57,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052267146] [2021-11-09 08:30:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:57,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:30:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:30:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:57,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:30:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:30:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:30:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:30:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:30:58,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:30:58,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052267146] [2021-11-09 08:30:58,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052267146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:58,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218532888] [2021-11-09 08:30:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:58,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:30:58,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:30:58,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:30:58,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:30:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:58,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:30:58,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:58,628 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 [2021-11-09 08:30:58,647 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 [2021-11-09 08:30:59,181 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-09 08:30:59,181 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 [2021-11-09 08:30:59,435 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 08:30:59,436 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 [2021-11-09 08:30:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:30:59,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218532888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:30:59,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:30:59,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-09 08:30:59,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653428181] [2021-11-09 08:30:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:30:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:30:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:30:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:30:59,484 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 21 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 08:31:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:00,769 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-11-09 08:31:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:31:00,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 53 [2021-11-09 08:31:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:00,771 INFO L225 Difference]: With dead ends: 163 [2021-11-09 08:31:00,771 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 08:31:00,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:31:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 08:31:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 142. [2021-11-09 08:31:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 128 states have internal predecessors, (135), 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) [2021-11-09 08:31:00,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 150 transitions. [2021-11-09 08:31:00,777 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 150 transitions. Word has length 53 [2021-11-09 08:31:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:00,778 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 150 transitions. [2021-11-09 08:31:00,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.473684210526316) internal successors, (66), 17 states have internal predecessors, (66), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 08:31:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 150 transitions. [2021-11-09 08:31:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:31:00,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:00,779 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-09 08:31:00,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:00,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:00,994 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_circular_insertErr1REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:31:00,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1164436709, now seen corresponding path program 1 times [2021-11-09 08:31:00,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:00,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388630759] [2021-11-09 08:31:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:00,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:31:01,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:31:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:31:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:31:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:31:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:31:01,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:01,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388630759] [2021-11-09 08:31:01,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388630759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:01,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84131859] [2021-11-09 08:31:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:01,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:01,560 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:01,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:31:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:01,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:31:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:01,861 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 [2021-11-09 08:31:01,888 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 [2021-11-09 08:31:02,274 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 08:31:02,275 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 20 treesize of output 28 [2021-11-09 08:31:02,636 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-09 08:31:02,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-11-09 08:31:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:31:02,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84131859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:02,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:02,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-11-09 08:31:02,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882856926] [2021-11-09 08:31:02,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:31:02,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:02,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:31:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:31:02,846 INFO L87 Difference]: Start difference. First operand 142 states and 150 transitions. Second operand has 24 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 19 states have internal predecessors, (74), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:31:04,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:04,365 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2021-11-09 08:31:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:31:04,366 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 19 states have internal predecessors, (74), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2021-11-09 08:31:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:04,367 INFO L225 Difference]: With dead ends: 154 [2021-11-09 08:31:04,367 INFO L226 Difference]: Without dead ends: 154 [2021-11-09 08:31:04,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:31:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-09 08:31:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 132. [2021-11-09 08:31:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.5432098765432098) internal successors, (125), 118 states have internal predecessors, (125), 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) [2021-11-09 08:31:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2021-11-09 08:31:04,373 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 53 [2021-11-09 08:31:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:04,373 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2021-11-09 08:31:04,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 19 states have internal predecessors, (74), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:31:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2021-11-09 08:31:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:31:04,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:04,375 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:04,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:04,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 08:31:04,588 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_circular_insertErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:31:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 716919785, now seen corresponding path program 1 times [2021-11-09 08:31:04,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:31:04,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140270333] [2021-11-09 08:31:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:04,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:31:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:04,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:31:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:04,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:31:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:31:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:04,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:31:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:04,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:31:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:31:05,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:31:05,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140270333] [2021-11-09 08:31:05,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140270333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:05,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645459484] [2021-11-09 08:31:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:05,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:31:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:31:05,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:31:05,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:31:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 08:31:05,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:05,679 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 [2021-11-09 08:31:05,933 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 [2021-11-09 08:31:16,783 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-09 08:31:16,783 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 48 treesize of output 40 [2021-11-09 08:31:16,796 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:31:16,797 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 37 treesize of output 39 [2021-11-09 08:31:16,943 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 08:31:16,943 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 43 treesize of output 25 [2021-11-09 08:31:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:31:16,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645459484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:31:16,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:31:16,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2021-11-09 08:31:16,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368445636] [2021-11-09 08:31:16,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:31:16,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:31:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:31:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=900, Unknown=7, NotChecked=0, Total=992 [2021-11-09 08:31:16,976 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 32 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 08:32:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:28,292 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2021-11-09 08:32:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:32:28,293 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2021-11-09 08:32:28,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:28,295 INFO L225 Difference]: With dead ends: 200 [2021-11-09 08:32:28,295 INFO L226 Difference]: Without dead ends: 200 [2021-11-09 08:32:28,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=237, Invalid=2193, Unknown=20, NotChecked=0, Total=2450 [2021-11-09 08:32:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-09 08:32:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2021-11-09 08:32:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.6136363636363635) internal successors, (142), 125 states have internal predecessors, (142), 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) [2021-11-09 08:32:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2021-11-09 08:32:28,303 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 56 [2021-11-09 08:32:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:28,303 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2021-11-09 08:32:28,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 08:32:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2021-11-09 08:32:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:32:28,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:28,304 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:28,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:28,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:28,521 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_circular_insertErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:32:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash 716919786, now seen corresponding path program 1 times [2021-11-09 08:32:28,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:28,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95209660] [2021-11-09 08:32:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:28,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:28,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:32:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:28,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:32:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:28,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:32:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:32:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:32:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:32:29,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:29,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95209660] [2021-11-09 08:32:29,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95209660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:29,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792011564] [2021-11-09 08:32:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:29,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:32:29,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:29,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:32:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:32:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-09 08:32:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:30,269 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 [2021-11-09 08:32:30,273 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 [2021-11-09 08:32:30,883 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 29 treesize of output 21 [2021-11-09 08:32:30,889 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 [2021-11-09 08:32:35,530 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-09 08:32:35,530 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 96 treesize of output 84 [2021-11-09 08:32:35,582 INFO L354 Elim1Store]: treesize reduction 193, result has 11.1 percent of original size [2021-11-09 08:32:35,583 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 85 treesize of output 77 [2021-11-09 08:32:35,593 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 08:32:35,593 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 74 treesize of output 74 [2021-11-09 08:32:35,606 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:32:35,606 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 68 treesize of output 70 [2021-11-09 08:32:35,827 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 08:32:35,828 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 81 treesize of output 59 [2021-11-09 08:32:35,835 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 08:32:35,836 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 50 treesize of output 32 [2021-11-09 08:32:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:32:35,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792011564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:32:35,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:32:35,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 34 [2021-11-09 08:32:35,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341719791] [2021-11-09 08:32:35,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:32:35,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:32:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1089, Unknown=2, NotChecked=0, Total=1190 [2021-11-09 08:32:35,986 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 35 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 08:33:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:05,524 INFO L93 Difference]: Finished difference Result 196 states and 208 transitions. [2021-11-09 08:33:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:33:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2021-11-09 08:33:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:05,538 INFO L225 Difference]: With dead ends: 196 [2021-11-09 08:33:05,538 INFO L226 Difference]: Without dead ends: 196 [2021-11-09 08:33:05,539 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=201, Invalid=2049, Unknown=6, NotChecked=0, Total=2256 [2021-11-09 08:33:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-09 08:33:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 139. [2021-11-09 08:33:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.5909090909090908) internal successors, (140), 125 states have internal predecessors, (140), 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) [2021-11-09 08:33:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2021-11-09 08:33:05,545 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 56 [2021-11-09 08:33:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:05,545 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2021-11-09 08:33:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 7 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-09 08:33:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2021-11-09 08:33:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:33:05,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:05,547 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:05,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:05,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:33:05,756 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_circular_insertErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:05,757 INFO L85 PathProgramCache]: Analyzing trace with hash 749675330, now seen corresponding path program 1 times [2021-11-09 08:33:05,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:05,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481411305] [2021-11-09 08:33:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:05,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:05,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:05,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:05,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:33:05,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:05,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481411305] [2021-11-09 08:33:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481411305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:05,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:05,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:33:05,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760057631] [2021-11-09 08:33:05,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:33:05,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:33:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:33:05,882 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:06,150 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2021-11-09 08:33:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:33:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2021-11-09 08:33:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:06,151 INFO L225 Difference]: With dead ends: 156 [2021-11-09 08:33:06,151 INFO L226 Difference]: Without dead ends: 156 [2021-11-09 08:33:06,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:33:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-09 08:33:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2021-11-09 08:33:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 84 states have (on average 1.5357142857142858) internal successors, (129), 121 states have internal predecessors, (129), 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) [2021-11-09 08:33:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2021-11-09 08:33:06,156 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 57 [2021-11-09 08:33:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:06,157 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2021-11-09 08:33:06,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2021-11-09 08:33:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:33:06,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:06,158 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:06,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 08:33:06,159 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_circular_insertErr30REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1116077725, now seen corresponding path program 1 times [2021-11-09 08:33:06,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:06,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988823372] [2021-11-09 08:33:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:06,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:33:06,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:06,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988823372] [2021-11-09 08:33:06,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988823372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:06,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:06,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:33:06,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961553335] [2021-11-09 08:33:06,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:33:06,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:06,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:33:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:06,279 INFO L87 Difference]: Start difference. First operand 135 states and 144 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:06,708 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2021-11-09 08:33:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:33:06,709 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-11-09 08:33:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:06,710 INFO L225 Difference]: With dead ends: 148 [2021-11-09 08:33:06,710 INFO L226 Difference]: Without dead ends: 148 [2021-11-09 08:33:06,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:33:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-09 08:33:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 129. [2021-11-09 08:33:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 115 states have internal predecessors, (123), 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) [2021-11-09 08:33:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2021-11-09 08:33:06,714 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 59 [2021-11-09 08:33:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:06,715 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2021-11-09 08:33:06,715 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2021-11-09 08:33:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:33:06,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:06,716 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:06,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 08:33:06,717 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_circular_insertErr31REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:06,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1116077724, now seen corresponding path program 1 times [2021-11-09 08:33:06,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:06,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140533127] [2021-11-09 08:33:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:06,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:33:06,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:06,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140533127] [2021-11-09 08:33:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140533127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:06,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:06,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:33:06,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328286663] [2021-11-09 08:33:06,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:33:06,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:33:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:33:06,848 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:33:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:07,269 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-11-09 08:33:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:33:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2021-11-09 08:33:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:07,271 INFO L225 Difference]: With dead ends: 147 [2021-11-09 08:33:07,271 INFO L226 Difference]: Without dead ends: 147 [2021-11-09 08:33:07,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:33:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-09 08:33:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 128. [2021-11-09 08:33:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 114 states have internal predecessors, (121), 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) [2021-11-09 08:33:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2021-11-09 08:33:07,285 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 59 [2021-11-09 08:33:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:07,285 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2021-11-09 08:33:07,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:33:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2021-11-09 08:33:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:33:07,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:07,287 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:07,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 08:33:07,287 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_circular_insertErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1114937977, now seen corresponding path program 1 times [2021-11-09 08:33:07,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:07,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311026997] [2021-11-09 08:33:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:07,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:33:07,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:07,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311026997] [2021-11-09 08:33:07,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311026997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:07,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:07,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:33:07,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479983483] [2021-11-09 08:33:07,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:33:07,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:33:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:07,427 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:33:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:07,822 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2021-11-09 08:33:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:33:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 59 [2021-11-09 08:33:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:07,824 INFO L225 Difference]: With dead ends: 144 [2021-11-09 08:33:07,824 INFO L226 Difference]: Without dead ends: 144 [2021-11-09 08:33:07,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:33:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-09 08:33:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 125. [2021-11-09 08:33:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 82 states have (on average 1.4268292682926829) internal successors, (117), 111 states have internal predecessors, (117), 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) [2021-11-09 08:33:07,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2021-11-09 08:33:07,828 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 59 [2021-11-09 08:33:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:07,829 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2021-11-09 08:33:07,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:33:07,829 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2021-11-09 08:33:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:33:07,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:07,830 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:07,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 08:33:07,830 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_circular_insertErr4REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash -203340444, now seen corresponding path program 1 times [2021-11-09 08:33:07,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:07,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598216148] [2021-11-09 08:33:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:07,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:33:07,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:07,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598216148] [2021-11-09 08:33:07,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598216148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:07,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:07,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:33:07,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856652722] [2021-11-09 08:33:07,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:33:07,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:07,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:33:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:33:07,936 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:08,287 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2021-11-09 08:33:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:33:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2021-11-09 08:33:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:08,289 INFO L225 Difference]: With dead ends: 145 [2021-11-09 08:33:08,290 INFO L226 Difference]: Without dead ends: 145 [2021-11-09 08:33:08,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-09 08:33:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2021-11-09 08:33:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 110 states have internal predecessors, (116), 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) [2021-11-09 08:33:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2021-11-09 08:33:08,294 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 60 [2021-11-09 08:33:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:08,295 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2021-11-09 08:33:08,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:08,295 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2021-11-09 08:33:08,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:33:08,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:08,296 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:08,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-09 08:33:08,296 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_circular_insertErr5REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:08,297 INFO L85 PathProgramCache]: Analyzing trace with hash -203340443, now seen corresponding path program 1 times [2021-11-09 08:33:08,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:08,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363420644] [2021-11-09 08:33:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:08,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:33:08,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:08,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363420644] [2021-11-09 08:33:08,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363420644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:08,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:08,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:33:08,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545107798] [2021-11-09 08:33:08,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:33:08,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:33:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:33:08,424 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:08,778 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2021-11-09 08:33:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:33:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2021-11-09 08:33:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:08,779 INFO L225 Difference]: With dead ends: 142 [2021-11-09 08:33:08,779 INFO L226 Difference]: Without dead ends: 142 [2021-11-09 08:33:08,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-09 08:33:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-11-09 08:33:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 109 states have internal predecessors, (115), 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) [2021-11-09 08:33:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2021-11-09 08:33:08,783 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 60 [2021-11-09 08:33:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:08,784 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2021-11-09 08:33:08,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2021-11-09 08:33:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:33:08,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:08,785 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:08,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-09 08:33:08,785 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_circular_insertErr7REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2008586346, now seen corresponding path program 1 times [2021-11-09 08:33:08,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:08,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593110563] [2021-11-09 08:33:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:08,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:33:08,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:08,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593110563] [2021-11-09 08:33:08,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593110563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:08,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:08,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:33:08,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996983341] [2021-11-09 08:33:08,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:33:08,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:33:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:08,945 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 8 states, 7 states have (on average 6.0) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:09,386 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2021-11-09 08:33:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:33:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2021-11-09 08:33:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:09,387 INFO L225 Difference]: With dead ends: 136 [2021-11-09 08:33:09,387 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 08:33:09,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:33:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 08:33:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2021-11-09 08:33:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.329268292682927) internal successors, (109), 103 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) [2021-11-09 08:33:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2021-11-09 08:33:09,391 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 61 [2021-11-09 08:33:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:09,391 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2021-11-09 08:33:09,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.0) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:33:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2021-11-09 08:33:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:33:09,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:09,392 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:09,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-09 08:33:09,393 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_circular_insertErr10REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1811159592, now seen corresponding path program 1 times [2021-11-09 08:33:09,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:09,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150309325] [2021-11-09 08:33:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:09,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:09,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:09,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:10,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:33:11,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:11,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150309325] [2021-11-09 08:33:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150309325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:11,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856698931] [2021-11-09 08:33:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:11,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:11,236 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:11,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:33:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-09 08:33:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:11,677 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 [2021-11-09 08:33:11,964 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:33:11,964 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 17 treesize of output 21 [2021-11-09 08:33:12,087 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 11 treesize of output 7 [2021-11-09 08:33:12,220 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 08:33:12,221 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 1 case distinctions, treesize of input 29 treesize of output 23 [2021-11-09 08:33:12,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:33:12,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:33:12,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-09 08:33:12,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106462205] [2021-11-09 08:33:12,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:33:12,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:12,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:33:12,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:33:12,301 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 32 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 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) [2021-11-09 08:33:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:22,514 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2021-11-09 08:33:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:33:22,515 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 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 63 [2021-11-09 08:33:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:22,516 INFO L225 Difference]: With dead ends: 135 [2021-11-09 08:33:22,516 INFO L226 Difference]: Without dead ends: 135 [2021-11-09 08:33:22,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=263, Invalid=3277, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:33:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-09 08:33:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 116. [2021-11-09 08:33:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 102 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) [2021-11-09 08:33:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-11-09 08:33:22,522 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 63 [2021-11-09 08:33:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:22,523 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-11-09 08:33:22,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 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) [2021-11-09 08:33:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-11-09 08:33:22,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:33:22,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:22,524 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:22,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:22,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:33:22,752 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_circular_insertErr11REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:33:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1811159591, now seen corresponding path program 1 times [2021-11-09 08:33:22,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:22,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320111870] [2021-11-09 08:33:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:22,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:23,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:23,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:33:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:23,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:33:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:23,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:33:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:33:25,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:25,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320111870] [2021-11-09 08:33:25,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320111870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:25,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055767358] [2021-11-09 08:33:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:25,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:25,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:33:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-09 08:33:25,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:25,504 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 [2021-11-09 08:33:25,514 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 [2021-11-09 08:33:26,105 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:33:26,106 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 17 treesize of output 21 [2021-11-09 08:33:26,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:33:26,366 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 11 treesize of output 7 [2021-11-09 08:33:26,377 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 11 treesize of output 7 [2021-11-09 08:33:26,542 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 56 treesize of output 46 [2021-11-09 08:33:26,547 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 36 treesize of output 35 [2021-11-09 08:33:26,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-09 08:33:26,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-09 08:33:27,052 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-09 08:33:27,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 88 [2021-11-09 08:33:27,083 INFO L354 Elim1Store]: treesize reduction 126, result has 21.3 percent of original size [2021-11-09 08:33:27,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 123 [2021-11-09 08:33:28,381 INFO L354 Elim1Store]: treesize reduction 73, result has 5.2 percent of original size [2021-11-09 08:33:28,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 201 treesize of output 87 [2021-11-09 08:33:28,410 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-11-09 08:33:28,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 60 [2021-11-09 08:33:28,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:28,422 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 50 treesize of output 46 [2021-11-09 08:33:28,430 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:28,431 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 40 treesize of output 36 [2021-11-09 08:33:41,427 INFO L354 Elim1Store]: treesize reduction 737, result has 6.8 percent of original size [2021-11-09 08:33:41,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 268 treesize of output 176 [2021-11-09 08:33:41,612 INFO L354 Elim1Store]: treesize reduction 821, result has 6.8 percent of original size [2021-11-09 08:33:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 199 treesize of output 194 [2021-11-09 08:33:41,641 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-09 08:33:41,641 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 188 treesize of output 190 [2021-11-09 08:33:41,669 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-09 08:33:41,669 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 181 treesize of output 186 [2021-11-09 08:33:43,664 INFO L354 Elim1Store]: treesize reduction 324, result has 3.9 percent of original size [2021-11-09 08:33:43,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 209 treesize of output 147 [2021-11-09 08:33:43,725 INFO L354 Elim1Store]: treesize reduction 270, result has 5.9 percent of original size [2021-11-09 08:33:43,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 120 treesize of output 93 [2021-11-09 08:33:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:44,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055767358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:44,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:44,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 64 [2021-11-09 08:33:44,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096058773] [2021-11-09 08:33:44,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-09 08:33:44,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-09 08:33:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3959, Unknown=6, NotChecked=0, Total=4160 [2021-11-09 08:33:44,939 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 65 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 53 states have internal predecessors, (101), 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) [2021-11-09 08:34:17,664 WARN L207 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 189 DAG size of output: 182 [2021-11-09 08:34:24,499 WARN L207 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 206 DAG size of output: 199 [2021-11-09 08:34:42,153 WARN L207 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 221 DAG size of output: 189 [2021-11-09 08:34:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:48,194 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2021-11-09 08:34:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:34:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 53 states have internal predecessors, (101), 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 63 [2021-11-09 08:34:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:48,195 INFO L225 Difference]: With dead ends: 134 [2021-11-09 08:34:48,196 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 08:34:48,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=465, Invalid=7357, Unknown=10, NotChecked=0, Total=7832 [2021-11-09 08:34:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 08:34:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-11-09 08:34:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 101 states have internal predecessors, (107), 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) [2021-11-09 08:34:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 122 transitions. [2021-11-09 08:34:48,202 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 122 transitions. Word has length 63 [2021-11-09 08:34:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:48,202 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 122 transitions. [2021-11-09 08:34:48,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 53 states have internal predecessors, (101), 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) [2021-11-09 08:34:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 122 transitions. [2021-11-09 08:34:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 08:34:48,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:48,204 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:48,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:48,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:34:48,420 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:34:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2071430628, now seen corresponding path program 1 times [2021-11-09 08:34:48,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:48,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304650851] [2021-11-09 08:34:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:48,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:48,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:34:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:48,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:34:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:49,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:34:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:49,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:34:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:49,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:34:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:50,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:34:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:34:51,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:51,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304650851] [2021-11-09 08:34:51,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304650851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:51,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266731879] [2021-11-09 08:34:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:51,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:51,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:51,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:51,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:34:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-09 08:34:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:52,252 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 [2021-11-09 08:34:52,339 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 [2021-11-09 08:34:52,601 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 [2021-11-09 08:34:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:53,306 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-09 08:34:53,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 22 [2021-11-09 08:34:53,584 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 34 treesize of output 22 [2021-11-09 08:34:53,588 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:34:53,589 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 22 treesize of output 18 [2021-11-09 08:34:53,592 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 [2021-11-09 08:36:06,548 INFO L354 Elim1Store]: treesize reduction 1038, result has 13.0 percent of original size [2021-11-09 08:36:06,549 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 7 case distinctions, treesize of input 452 treesize of output 384 [2021-11-09 08:36:06,575 INFO L354 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2021-11-09 08:36:06,575 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 561 treesize of output 563 [2021-11-09 08:36:06,629 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-09 08:36:06,630 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 576 treesize of output 586 [2021-11-09 08:36:23,550 INFO L354 Elim1Store]: treesize reduction 72, result has 45.9 percent of original size [2021-11-09 08:36:23,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 147 [2021-11-09 08:36:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:36:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266731879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:23,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:23,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 31] total 67 [2021-11-09 08:36:23,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497912764] [2021-11-09 08:36:23,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 08:36:23,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 08:36:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=4339, Unknown=28, NotChecked=0, Total=4556 [2021-11-09 08:36:23,789 INFO L87 Difference]: Start difference. First operand 115 states and 122 transitions. Second operand has 68 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 56 states have internal predecessors, (107), 10 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:42:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:23,697 INFO L93 Difference]: Finished difference Result 205 states and 216 transitions. [2021-11-09 08:42:23,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:42:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 56 states have internal predecessors, (107), 10 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 68 [2021-11-09 08:42:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:23,699 INFO L225 Difference]: With dead ends: 205 [2021-11-09 08:42:23,699 INFO L226 Difference]: Without dead ends: 205 [2021-11-09 08:42:23,704 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 250.8s TimeCoverageRelationStatistics Valid=530, Invalid=10300, Unknown=90, NotChecked=0, Total=10920 [2021-11-09 08:42:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-09 08:42:23,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 119. [2021-11-09 08:42:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 104 states have internal predecessors, (111), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-09 08:42:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2021-11-09 08:42:23,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 68 [2021-11-09 08:42:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:23,711 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2021-11-09 08:42:23,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 56 states have internal predecessors, (107), 10 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:42:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2021-11-09 08:42:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 08:42:23,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:23,713 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:23,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:42:23,940 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:42:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2071430629, now seen corresponding path program 1 times [2021-11-09 08:42:23,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:23,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235009985] [2021-11-09 08:42:23,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:23,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:24,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:24,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:42:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:42:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:42:29,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:29,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235009985] [2021-11-09 08:42:29,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235009985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:29,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175121940] [2021-11-09 08:42:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:29,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:29,013 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:29,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:42:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-09 08:42:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:29,703 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 [2021-11-09 08:42:29,717 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 [2021-11-09 08:42:30,209 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 [2021-11-09 08:42:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-11-09 08:42:30,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:30,980 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 21 treesize of output 20 [2021-11-09 08:42:31,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:42:31,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:31,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-09 08:42:31,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044937749] [2021-11-09 08:42:31,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:42:31,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:31,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:42:31,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:42:31,129 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 40 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 33 states have internal predecessors, (55), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:42:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:38,780 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2021-11-09 08:42:38,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:42:38,780 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 33 states have internal predecessors, (55), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 68 [2021-11-09 08:42:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:38,781 INFO L225 Difference]: With dead ends: 159 [2021-11-09 08:42:38,782 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 08:42:38,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=288, Invalid=4968, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:42:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 08:42:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 121. [2021-11-09 08:42:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 106 states have internal predecessors, (113), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-09 08:42:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-11-09 08:42:38,789 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 68 [2021-11-09 08:42:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:38,789 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-11-09 08:42:38,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 33 states have internal predecessors, (55), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:42:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-11-09 08:42:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:42:38,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:38,791 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:38,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:39,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 08:42:39,005 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:42:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash 17533747, now seen corresponding path program 1 times [2021-11-09 08:42:39,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:39,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953167653] [2021-11-09 08:42:39,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:39,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:42:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:42:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:42:39,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:39,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953167653] [2021-11-09 08:42:39,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953167653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:39,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:39,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 08:42:39,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400395306] [2021-11-09 08:42:39,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:42:39,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:42:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:42:39,265 INFO L87 Difference]: Start difference. First operand 121 states and 129 transitions. Second operand has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-09 08:42:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:40,081 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2021-11-09 08:42:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:42:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2021-11-09 08:42:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:40,083 INFO L225 Difference]: With dead ends: 161 [2021-11-09 08:42:40,083 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 08:42:40,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:42:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 08:42:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-11-09 08:42:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 107 states have internal predecessors, (115), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-09 08:42:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2021-11-09 08:42:40,088 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 69 [2021-11-09 08:42:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:40,089 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2021-11-09 08:42:40,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-09 08:42:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2021-11-09 08:42:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:42:40,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:40,090 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:40,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 08:42:40,091 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:42:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash 17533748, now seen corresponding path program 1 times [2021-11-09 08:42:40,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:40,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439180016] [2021-11-09 08:42:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:40,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:42:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:42:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:42:40,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:40,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439180016] [2021-11-09 08:42:40,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439180016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:42:40,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:42:40,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 08:42:40,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909270752] [2021-11-09 08:42:40,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:42:40,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:42:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:42:40,439 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-09 08:42:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:41,391 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2021-11-09 08:42:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:42:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2021-11-09 08:42:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:41,393 INFO L225 Difference]: With dead ends: 161 [2021-11-09 08:42:41,393 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 08:42:41,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:42:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 08:42:41,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-11-09 08:42:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 103 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) [2021-11-09 08:42:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2021-11-09 08:42:41,398 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 69 [2021-11-09 08:42:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:41,398 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2021-11-09 08:42:41,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.454545454545454) internal successors, (49), 9 states have internal predecessors, (49), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-09 08:42:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2021-11-09 08:42:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:42:41,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:41,399 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:41,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 08:42:41,399 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting dll_circular_insertErr24REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:42:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 180188719, now seen corresponding path program 1 times [2021-11-09 08:42:41,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:41,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43728157] [2021-11-09 08:42:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:41,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:41,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:41,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:42:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-09 08:42:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:42:41,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:41,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43728157] [2021-11-09 08:42:41,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43728157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:41,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438115234] [2021-11-09 08:42:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:41,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:41,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:41,600 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:41,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:42:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:42,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 08:42:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:42,536 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 29 treesize of output 21 [2021-11-09 08:42:42,538 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 [2021-11-09 08:42:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:42:42,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438115234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:42,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:42,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-11-09 08:42:42,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118755440] [2021-11-09 08:42:42,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:42:42,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:42:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:42:42,561 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:42:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:43,106 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-11-09 08:42:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:42:43,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2021-11-09 08:42:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:43,107 INFO L225 Difference]: With dead ends: 120 [2021-11-09 08:42:43,107 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 08:42:43,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:42:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 08:42:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-11-09 08:42:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.273972602739726) internal successors, (93), 87 states have internal predecessors, (93), 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) [2021-11-09 08:42:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2021-11-09 08:42:43,111 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 69 [2021-11-09 08:42:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:43,112 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2021-11-09 08:42:43,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 7 states have internal predecessors, (46), 1 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-09 08:42:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2021-11-09 08:42:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:42:43,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:43,113 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:43,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:43,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:43,324 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:42:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2074977376, now seen corresponding path program 1 times [2021-11-09 08:42:43,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:43,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563047180] [2021-11-09 08:42:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:43,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:43,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:43,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:44,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:42:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:44,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:42:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:42:49,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:49,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563047180] [2021-11-09 08:42:49,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563047180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:49,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468594447] [2021-11-09 08:42:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:49,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:49,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:49,276 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:49,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:42:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:50,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-09 08:42:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:50,031 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 [2021-11-09 08:42:50,142 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 [2021-11-09 08:42:50,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2021-11-09 08:42:51,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-11-09 08:42:51,535 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 23 treesize of output 11 [2021-11-09 08:42:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,723 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 47 treesize of output 46 [2021-11-09 08:42:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-11-09 08:42:52,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:42:52,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:42:52,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-11-09 08:42:52,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507832060] [2021-11-09 08:42:52,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:42:52,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:42:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3032, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:42:52,041 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 43 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 36 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:43:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:02,755 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2021-11-09 08:43:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:43:02,755 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 36 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 70 [2021-11-09 08:43:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:02,756 INFO L225 Difference]: With dead ends: 143 [2021-11-09 08:43:02,757 INFO L226 Difference]: Without dead ends: 143 [2021-11-09 08:43:02,759 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=325, Invalid=6155, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:43:02,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-09 08:43:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-11-09 08:43:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 92 states have internal predecessors, (98), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-09 08:43:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-11-09 08:43:02,765 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 70 [2021-11-09 08:43:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:02,765 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-11-09 08:43:02,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 36 states have internal predecessors, (57), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:43:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-11-09 08:43:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:43:02,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:02,767 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:02,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:02,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 08:43:02,980 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:43:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -329936401, now seen corresponding path program 1 times [2021-11-09 08:43:02,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:02,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232325799] [2021-11-09 08:43:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:02,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:43:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:43:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:43:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:03,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:03,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232325799] [2021-11-09 08:43:03,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232325799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:03,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997340039] [2021-11-09 08:43:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:03,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:03,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:03,974 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:03,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:43:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-09 08:43:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:04,762 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-09 08:43:04,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 24 [2021-11-09 08:43:04,923 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 08:43:04,924 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 21 treesize of output 26 [2021-11-09 08:43:05,822 INFO L354 Elim1Store]: treesize reduction 82, result has 16.3 percent of original size [2021-11-09 08:43:05,823 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 4 case distinctions, treesize of input 28 treesize of output 35 [2021-11-09 08:43:06,309 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 17 treesize of output 9 [2021-11-09 08:43:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 08:43:06,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997340039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:06,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:06,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-11-09 08:43:06,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240082221] [2021-11-09 08:43:06,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:43:06,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:43:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:43:06,523 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 36 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 31 states have internal predecessors, (104), 7 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-09 08:43:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:11,188 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-09 08:43:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:43:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 31 states have internal predecessors, (104), 7 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 71 [2021-11-09 08:43:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:11,189 INFO L225 Difference]: With dead ends: 116 [2021-11-09 08:43:11,189 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 08:43:11,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=325, Invalid=3097, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:43:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 08:43:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2021-11-09 08:43:11,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 82 states have internal predecessors, (86), 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) [2021-11-09 08:43:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-11-09 08:43:11,195 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 71 [2021-11-09 08:43:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:11,195 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-11-09 08:43:11,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 31 states have internal predecessors, (104), 7 states have call successors, (14), 5 states have call predecessors, (14), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-09 08:43:11,196 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-11-09 08:43:11,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 08:43:11,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:11,197 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:11,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-09 08:43:11,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:11,404 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:43:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:11,405 INFO L85 PathProgramCache]: Analyzing trace with hash -341021997, now seen corresponding path program 1 times [2021-11-09 08:43:11,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:11,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210993153] [2021-11-09 08:43:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:11,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:11,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:11,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:43:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:12,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:43:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:12,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:43:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:14,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:15,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:15,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210993153] [2021-11-09 08:43:15,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210993153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:15,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798447892] [2021-11-09 08:43:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:15,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:15,946 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:15,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:43:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-09 08:43:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:16,842 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 [2021-11-09 08:43:16,856 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 [2021-11-09 08:43:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-11-09 08:43:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:18,295 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 21 treesize of output 20 [2021-11-09 08:43:18,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:43:18,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-09 08:43:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453842242] [2021-11-09 08:43:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:43:18,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:43:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2630, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:43:18,468 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 42 states, 38 states have (on average 1.605263157894737) internal successors, (61), 35 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:43:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:25,818 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2021-11-09 08:43:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:43:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 1.605263157894737) internal successors, (61), 35 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 74 [2021-11-09 08:43:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:25,820 INFO L225 Difference]: With dead ends: 127 [2021-11-09 08:43:25,820 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 08:43:25,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=243, Invalid=4869, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 08:43:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 08:43:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-11-09 08:43:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 86 states have internal predecessors, (92), 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) [2021-11-09 08:43:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-11-09 08:43:25,826 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 74 [2021-11-09 08:43:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:25,827 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-11-09 08:43:25,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 1.605263157894737) internal successors, (61), 35 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:43:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-11-09 08:43:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 08:43:25,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:25,829 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:25,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:26,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:43:26,052 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr3REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:43:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash -341021996, now seen corresponding path program 1 times [2021-11-09 08:43:26,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:26,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644102153] [2021-11-09 08:43:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:26,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:26,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:26,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:43:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:27,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:43:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:27,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:43:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:29,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:31,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:31,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644102153] [2021-11-09 08:43:31,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644102153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:31,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559751088] [2021-11-09 08:43:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:31,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:31,144 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:31,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:43:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-09 08:43:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:32,127 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 [2021-11-09 08:43:32,142 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 [2021-11-09 08:43:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-11-09 08:43:33,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:33,393 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 21 treesize of output 20 [2021-11-09 08:43:33,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:43:33,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:33,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-09 08:43:33,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476887115] [2021-11-09 08:43:33,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 08:43:33,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 08:43:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:43:33,566 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 42 states, 38 states have (on average 1.605263157894737) internal successors, (61), 35 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:43:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:41,203 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2021-11-09 08:43:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:43:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 1.605263157894737) internal successors, (61), 35 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 74 [2021-11-09 08:43:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:41,205 INFO L225 Difference]: With dead ends: 130 [2021-11-09 08:43:41,205 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 08:43:41,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=234, Invalid=4736, Unknown=0, NotChecked=0, Total=4970 [2021-11-09 08:43:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 08:43:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2021-11-09 08:43:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 88 states have internal predecessors, (94), 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) [2021-11-09 08:43:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2021-11-09 08:43:41,211 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 74 [2021-11-09 08:43:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:41,211 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2021-11-09 08:43:41,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 1.605263157894737) internal successors, (61), 35 states have internal predecessors, (61), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:43:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2021-11-09 08:43:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:43:41,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:41,213 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:41,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:41,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 08:43:41,428 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:43:41,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1981748344, now seen corresponding path program 1 times [2021-11-09 08:43:41,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:41,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568681275] [2021-11-09 08:43:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:41,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:41,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:43:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:42,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:42,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:43:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:42,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:43:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:45,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:46,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:46,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568681275] [2021-11-09 08:43:46,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568681275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:46,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295231076] [2021-11-09 08:43:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:46,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:46,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:46,182 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:46,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:43:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:47,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-09 08:43:47,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:47,218 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 [2021-11-09 08:43:47,235 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 [2021-11-09 08:43:48,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-11-09 08:43:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:48,598 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 21 treesize of output 20 [2021-11-09 08:43:48,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:43:48,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:48,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-11-09 08:43:48,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913374205] [2021-11-09 08:43:48,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:43:48,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:43:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2734, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:43:48,772 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 43 states, 40 states have (on average 1.55) internal successors, (62), 36 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:43:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:56,197 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-11-09 08:43:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:43:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 1.55) internal successors, (62), 36 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 75 [2021-11-09 08:43:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:56,198 INFO L225 Difference]: With dead ends: 124 [2021-11-09 08:43:56,198 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 08:43:56,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=241, Invalid=5015, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 08:43:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 08:43:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2021-11-09 08:43:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 88 states have internal predecessors, (93), 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) [2021-11-09 08:43:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2021-11-09 08:43:56,202 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 75 [2021-11-09 08:43:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:56,202 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2021-11-09 08:43:56,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 1.55) internal successors, (62), 36 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:43:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2021-11-09 08:43:56,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 08:43:56,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:56,204 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:56,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-09 08:43:56,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 08:43:56,450 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_LEAK === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:43:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1304622705, now seen corresponding path program 1 times [2021-11-09 08:43:56,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:56,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713028723] [2021-11-09 08:43:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:56,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:56,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:43:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:56,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:43:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:43:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:57,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-09 08:43:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-09 08:43:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:00,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:44:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:44:01,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:44:01,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713028723] [2021-11-09 08:44:01,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713028723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:01,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789382997] [2021-11-09 08:44:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:01,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:44:01,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:44:01,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:44:01,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:44:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-09 08:44:02,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:44:02,794 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 [2021-11-09 08:44:02,897 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 [2021-11-09 08:44:04,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-11-09 08:44:04,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:44:04,322 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 21 treesize of output 20 [2021-11-09 08:44:04,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_circular_create_~head~0.offset] [2021-11-09 08:44:04,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:44:04,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-11-09 08:44:04,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516140351] [2021-11-09 08:44:04,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:44:04,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:44:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2943, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 08:44:04,522 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 44 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:44:13,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:13,120 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2021-11-09 08:44:13,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:44:13,120 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 76 [2021-11-09 08:44:13,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:13,121 INFO L225 Difference]: With dead ends: 122 [2021-11-09 08:44:13,122 INFO L226 Difference]: Without dead ends: 122 [2021-11-09 08:44:13,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=273, Invalid=5733, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:44:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-09 08:44:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-11-09 08:44:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 88 states have internal predecessors, (92), 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) [2021-11-09 08:44:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-11-09 08:44:13,125 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 76 [2021-11-09 08:44:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:44:13,125 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-11-09 08:44:13,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 08:44:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-11-09 08:44:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-09 08:44:13,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:44:13,126 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2021-11-09 08:44:13,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:44:13,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b3731a17-bab1-47d7-a873-eb0047736769/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 08:44:13,327 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr2REQUIRES_VIOLATION === [dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION (and 69 more)] === [2021-11-09 08:44:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:44:13,327 INFO L85 PathProgramCache]: Analyzing trace with hash -728260478, now seen corresponding path program 2 times [2021-11-09 08:44:13,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:44:13,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657184563] [2021-11-09 08:44:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:44:13,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:44:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:44:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:44:13,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:44:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat