./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/960521-1-2.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_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/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_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/960521-1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/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_f9767c04-b808-40e8-a524-043725a8dd54/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 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:52:37,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:52:37,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:52:37,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:52:37,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:52:37,989 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:52:37,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:52:37,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:52:37,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:52:38,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:52:38,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:52:38,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:52:38,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:52:38,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:52:38,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:52:38,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:52:38,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:52:38,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:52:38,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:52:38,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:52:38,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:52:38,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:52:38,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:52:38,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:52:38,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:52:38,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:52:38,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:52:38,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:52:38,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:52:38,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:52:38,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:52:38,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:52:38,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:52:38,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:52:38,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:52:38,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:52:38,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:52:38,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:52:38,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:52:38,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:52:38,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:52:38,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:52:38,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:52:38,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:52:38,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:52:38,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:52:38,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:52:38,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:52:38,091 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:52:38,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:52:38,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:52:38,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:52:38,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:52:38,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:52:38,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:52:38,093 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:52:38,093 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:52:38,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:52:38,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:52:38,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:52:38,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:52:38,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:52:38,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:52:38,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:52:38,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:52:38,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:38,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:52:38,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:52:38,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:52:38,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:52:38,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:52:38,098 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_f9767c04-b808-40e8-a524-043725a8dd54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19e2947f690bcfa099d607c2a0a6dc0e6f351f54e3f3874a42109cbf9e336957 [2021-11-09 09:52:38,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:52:38,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:52:38,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:52:38,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:52:38,456 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:52:38,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety/960521-1-2.i [2021-11-09 09:52:38,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/data/e5722007f/1572b4e9b6ed43f7a0e042fe68719541/FLAG910e42fae [2021-11-09 09:52:39,088 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:52:39,088 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/sv-benchmarks/c/memsafety/960521-1-2.i [2021-11-09 09:52:39,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/data/e5722007f/1572b4e9b6ed43f7a0e042fe68719541/FLAG910e42fae [2021-11-09 09:52:39,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/data/e5722007f/1572b4e9b6ed43f7a0e042fe68719541 [2021-11-09 09:52:39,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:52:39,400 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:52:39,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:39,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:52:39,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:52:39,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:39,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118a596c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39, skipping insertion in model container [2021-11-09 09:52:39,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:39,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:52:39,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:52:39,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:39,816 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:52:39,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:52:39,948 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:52:39,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39 WrapperNode [2021-11-09 09:52:39,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:52:39,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:52:39,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:52:39,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:52:39,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:39,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:39,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:39,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:40,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:40,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:40,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:40,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:52:40,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:52:40,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:52:40,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:52:40,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (1/1) ... [2021-11-09 09:52:40,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:52:40,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:40,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:52:40,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:52:40,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:52:40,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:52:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 09:52:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:52:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:52:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 09:52:40,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 09:52:40,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 09:52:40,155 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-11-09 09:52:40,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:52:40,156 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:52:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 09:52:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 09:52:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 09:52:40,157 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:52:40,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:52:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:52:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:52:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:52:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:52:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:52:40,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:52:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:52:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:52:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:52:40,160 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:52:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:52:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:52:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 09:52:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 09:52:40,161 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 09:52:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:52:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:52:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:52:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:52:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:52:40,162 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:52:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:52:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:52:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:52:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:52:40,163 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:52:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:52:40,164 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:52:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:52:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:52:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:52:40,165 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:52:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:52:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:52:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:52:40,166 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:52:40,167 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:52:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:52:40,168 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:52:40,169 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:52:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:52:40,170 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:52:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:52:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:52:40,171 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:52:40,172 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:52:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:52:40,173 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:52:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:52:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:52:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:52:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:52:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:52:40,174 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:52:40,175 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:52:40,176 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:52:40,176 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:52:40,176 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:52:40,176 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:52:40,176 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:52:40,176 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:52:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:52:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:52:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:52:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:52:40,177 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:52:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:52:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:52:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:52:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:52:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:52:40,178 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:52:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:52:40,179 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:52:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:52:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:52:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:52:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:52:40,180 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:52:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:52:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:52:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:52:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-11-09 09:52:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:52:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:52:40,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:52:40,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:52:40,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:52:40,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:52:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:52:40,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:52:40,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:52:40,721 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-09 09:52:40,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:40 BoogieIcfgContainer [2021-11-09 09:52:40,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:52:40,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:52:40,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:52:40,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:52:40,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:52:39" (1/3) ... [2021-11-09 09:52:40,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439656d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:40, skipping insertion in model container [2021-11-09 09:52:40,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:52:39" (2/3) ... [2021-11-09 09:52:40,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@439656d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:52:40, skipping insertion in model container [2021-11-09 09:52:40,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:52:40" (3/3) ... [2021-11-09 09:52:40,739 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-2.i [2021-11-09 09:52:40,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:52:40,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-09 09:52:40,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:52:40,809 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 09:52:40,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-09 09:52:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:52:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:52:40,839 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:40,840 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:40,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1574615304, now seen corresponding path program 1 times [2021-11-09 09:52:40,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:40,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544643055] [2021-11-09 09:52:40,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:40,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:41,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:41,343 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 09:52:41,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:41,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544643055] [2021-11-09 09:52:41,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544643055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:41,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:41,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681536783] [2021-11-09 09:52:41,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:41,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:41,380 INFO L87 Difference]: Start difference. First operand has 59 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:41,607 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-11-09 09:52:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 09:52:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:41,618 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:52:41,619 INFO L226 Difference]: Without dead ends: 55 [2021-11-09 09:52:41,621 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 09:52:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-09 09:52:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-11-09 09:52:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 49 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-11-09 09:52:41,668 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 7 [2021-11-09 09:52:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:41,668 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-11-09 09:52:41,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-11-09 09:52:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:52:41,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:41,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:41,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:52:41,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:41,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1574615305, now seen corresponding path program 1 times [2021-11-09 09:52:41,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:41,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811459706] [2021-11-09 09:52:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:41,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:41,790 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 09:52:41,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:41,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811459706] [2021-11-09 09:52:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811459706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:41,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:41,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:52:41,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074641371] [2021-11-09 09:52:41,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:41,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:41,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:52:41,795 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:41,910 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-11-09 09:52:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:41,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-09 09:52:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:41,912 INFO L225 Difference]: With dead ends: 54 [2021-11-09 09:52:41,912 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:52:41,913 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 09:52:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:52:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-09 09:52:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.7) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-09 09:52:41,921 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 7 [2021-11-09 09:52:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:41,921 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-09 09:52:41,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-09 09:52:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:52:41,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:41,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:41,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:52:41,923 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -132353852, now seen corresponding path program 1 times [2021-11-09 09:52:41,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:41,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387344677] [2021-11-09 09:52:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:41,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:42,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:42,131 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 09:52:42,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:42,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387344677] [2021-11-09 09:52:42,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387344677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:42,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:42,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:42,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544885385] [2021-11-09 09:52:42,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:52:42,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:52:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:42,144 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:42,374 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-09 09:52:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:52:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-09 09:52:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:42,380 INFO L225 Difference]: With dead ends: 51 [2021-11-09 09:52:42,383 INFO L226 Difference]: Without dead ends: 51 [2021-11-09 09:52:42,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:52:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-09 09:52:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-09 09:52:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.6) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-09 09:52:42,402 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 12 [2021-11-09 09:52:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:42,403 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-09 09:52:42,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-09 09:52:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:52:42,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:42,405 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:42,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:52:42,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash -132353851, now seen corresponding path program 1 times [2021-11-09 09:52:42,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:42,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256827077] [2021-11-09 09:52:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:42,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:42,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:42,735 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 09:52:42,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:42,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256827077] [2021-11-09 09:52:42,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256827077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:42,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:42,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:52:42,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437254667] [2021-11-09 09:52:42,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:52:42,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:52:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:52:42,740 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:43,059 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-09 09:52:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:52:43,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-09 09:52:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:43,062 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:52:43,063 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:52:43,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:52:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:52:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-11-09 09:52:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 46 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-09 09:52:43,073 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 12 [2021-11-09 09:52:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:43,074 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-09 09:52:43,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-09 09:52:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:52:43,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:43,076 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:43,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:52:43,077 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:43,078 INFO L85 PathProgramCache]: Analyzing trace with hash -173587642, now seen corresponding path program 1 times [2021-11-09 09:52:43,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:43,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410798654] [2021-11-09 09:52:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:43,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:43,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:43,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410798654] [2021-11-09 09:52:43,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410798654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:43,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526291108] [2021-11-09 09:52:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:43,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:43,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:43,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:52:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:52:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:43,785 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:52:43,786 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-09 09:52:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:44,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526291108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:44,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:44,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-11-09 09:52:44,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998957517] [2021-11-09 09:52:44,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:52:44,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:44,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:52:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:52:44,163 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:44,673 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-11-09 09:52:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:52:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 09:52:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:44,675 INFO L225 Difference]: With dead ends: 65 [2021-11-09 09:52:44,675 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 09:52:44,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 09:52:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-11-09 09:52:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-09 09:52:44,683 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 15 [2021-11-09 09:52:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:44,684 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-09 09:52:44,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-09 09:52:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:52:44,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:44,688 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:44,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:44,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:44,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash -208808667, now seen corresponding path program 2 times [2021-11-09 09:52:44,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:44,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537161937] [2021-11-09 09:52:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:44,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:45,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:45,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537161937] [2021-11-09 09:52:45,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537161937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:45,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875743156] [2021-11-09 09:52:45,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:45,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:45,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:45,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:52:45,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:45,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:52:45,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:45,403 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:52:45,405 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-09 09:52:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:45,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875743156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:45,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-11-09 09:52:45,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461065501] [2021-11-09 09:52:45,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:52:45,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:52:45,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:52:45,776 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:46,437 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-09 09:52:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:52:46,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-09 09:52:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:46,439 INFO L225 Difference]: With dead ends: 73 [2021-11-09 09:52:46,439 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 09:52:46,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:52:46,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 09:52:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-11-09 09:52:46,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 58 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2021-11-09 09:52:46,451 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 18 [2021-11-09 09:52:46,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:46,452 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2021-11-09 09:52:46,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2021-11-09 09:52:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:52:46,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:46,459 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:46,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:46,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:52:46,677 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1506344218, now seen corresponding path program 3 times [2021-11-09 09:52:46,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:46,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750084968] [2021-11-09 09:52:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:46,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:46,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:46,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:46,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750084968] [2021-11-09 09:52:46,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750084968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:46,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27736869] [2021-11-09 09:52:46,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:46,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:46,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:46,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:52:47,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:52:47,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:52:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:47,190 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:52:47,191 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 1 case distinctions, treesize of input 13 treesize of output 15 [2021-11-09 09:52:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:52:47,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27736869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:47,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:47,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-11-09 09:52:47,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600710886] [2021-11-09 09:52:47,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:52:47,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:47,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:52:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:47,510 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:48,386 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-11-09 09:52:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:52:48,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-09 09:52:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:48,391 INFO L225 Difference]: With dead ends: 86 [2021-11-09 09:52:48,391 INFO L226 Difference]: Without dead ends: 86 [2021-11-09 09:52:48,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:52:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-09 09:52:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 68. [2021-11-09 09:52:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.38) internal successors, (69), 62 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-11-09 09:52:48,402 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 21 [2021-11-09 09:52:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:48,402 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-11-09 09:52:48,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-11-09 09:52:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:52:48,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:48,405 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:48,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:48,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:48,622 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:48,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1604794640, now seen corresponding path program 1 times [2021-11-09 09:52:48,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:48,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414144634] [2021-11-09 09:52:48,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:48,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:48,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-09 09:52:48,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:48,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414144634] [2021-11-09 09:52:48,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414144634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:48,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:48,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:48,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934884413] [2021-11-09 09:52:48,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:52:48,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:52:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:48,791 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:48,969 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-11-09 09:52:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:52:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-09 09:52:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:48,971 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:52:48,971 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 09:52:48,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:52:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 09:52:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-09 09:52:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.3) internal successors, (65), 60 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-09 09:52:48,986 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 29 [2021-11-09 09:52:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:48,987 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-09 09:52:48,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-09 09:52:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:52:48,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:48,989 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:48,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:52:48,989 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:48,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1604794641, now seen corresponding path program 1 times [2021-11-09 09:52:48,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:48,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756907402] [2021-11-09 09:52:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:48,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:49,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:49,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:49,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756907402] [2021-11-09 09:52:49,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756907402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:49,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069287464] [2021-11-09 09:52:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:49,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:49,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:49,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:52:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:52:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:49,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069287464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:49,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:49,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-11-09 09:52:49,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268983940] [2021-11-09 09:52:49,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:52:49,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:52:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:52:49,734 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (4), 3 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 09:52:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:50,293 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-11-09 09:52:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:52:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (4), 3 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 29 [2021-11-09 09:52:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:50,295 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:52:50,295 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:52:50,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:52:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:52:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-11-09 09:52:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 72 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-11-09 09:52:50,315 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 29 [2021-11-09 09:52:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:50,316 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-11-09 09:52:50,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (4), 3 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 09:52:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-11-09 09:52:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:52:50,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:50,321 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:50,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:50,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:50,544 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1604478800, now seen corresponding path program 2 times [2021-11-09 09:52:50,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:50,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92361718] [2021-11-09 09:52:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:50,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:50,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:52:50,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:50,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92361718] [2021-11-09 09:52:50,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92361718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:50,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557297412] [2021-11-09 09:52:50,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:50,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:50,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:50,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:50,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:52:50,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 09:52:50,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:52:50,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:51,038 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:52:51,039 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-09 09:52:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-09 09:52:51,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557297412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:51,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:51,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 13 [2021-11-09 09:52:51,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163271760] [2021-11-09 09:52:51,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:52:51,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:52:51,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:51,521 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:51,588 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-11-09 09:52:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:52:51,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-09 09:52:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:51,591 INFO L225 Difference]: With dead ends: 72 [2021-11-09 09:52:51,591 INFO L226 Difference]: Without dead ends: 72 [2021-11-09 09:52:51,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:52:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-09 09:52:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-09 09:52:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-11-09 09:52:51,599 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 32 [2021-11-09 09:52:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:51,600 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-11-09 09:52:51,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-11-09 09:52:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:52:51,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:51,610 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:51,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:51,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:52:51,811 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -336866964, now seen corresponding path program 1 times [2021-11-09 09:52:51,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:51,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462643899] [2021-11-09 09:52:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:51,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:51,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:51,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:51,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462643899] [2021-11-09 09:52:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462643899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:51,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534206834] [2021-11-09 09:52:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:51,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:51,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:51,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:51,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:52:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:52:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:52,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534206834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:52,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:52,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-09 09:52:52,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180450318] [2021-11-09 09:52:52,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:52:52,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:52:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:52:52,534 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 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 09:52:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:53,099 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-09 09:52:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:52:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 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 35 [2021-11-09 09:52:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:53,101 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:52:53,101 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:52:53,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=417, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:52:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:52:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-11-09 09:52:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-11-09 09:52:53,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 35 [2021-11-09 09:52:53,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:53,110 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-11-09 09:52:53,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (4), 3 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 09:52:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-11-09 09:52:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:52:53,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:53,112 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:53,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:53,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:53,332 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1759658549, now seen corresponding path program 2 times [2021-11-09 09:52:53,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:53,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124174783] [2021-11-09 09:52:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:53,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:53,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:53,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124174783] [2021-11-09 09:52:53,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124174783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:53,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070472904] [2021-11-09 09:52:53,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:53,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:53,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:53,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:53,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:52:53,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:53,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:52:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:54,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070472904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:54,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:54,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-11-09 09:52:54,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992251039] [2021-11-09 09:52:54,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:52:54,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:52:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:52:54,184 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 states have call successors, (4), 3 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 09:52:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:54,808 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2021-11-09 09:52:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:52:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 states have call successors, (4), 3 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 38 [2021-11-09 09:52:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:54,810 INFO L225 Difference]: With dead ends: 95 [2021-11-09 09:52:54,810 INFO L226 Difference]: Without dead ends: 95 [2021-11-09 09:52:54,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:52:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-09 09:52:54,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2021-11-09 09:52:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 78 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-11-09 09:52:54,817 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 38 [2021-11-09 09:52:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:54,818 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-11-09 09:52:54,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 states have call successors, (4), 3 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 09:52:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-11-09 09:52:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 09:52:54,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:54,820 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:54,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:55,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:55,021 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1111523060, now seen corresponding path program 3 times [2021-11-09 09:52:55,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:55,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192106040] [2021-11-09 09:52:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:55,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:55,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:52:55,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:55,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192106040] [2021-11-09 09:52:55,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192106040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:55,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406034338] [2021-11-09 09:52:55,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:52:55,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:55,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:55,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:52:55,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:52:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:52:55,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:55,577 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:52:55,577 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 1 case distinctions, treesize of input 17 treesize of output 18 [2021-11-09 09:52:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:52:56,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406034338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:56,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:52:56,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-11-09 09:52:56,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008585596] [2021-11-09 09:52:56,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:52:56,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:52:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:52:56,235 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:56,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:56,314 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-11-09 09:52:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:52:56,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-11-09 09:52:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:56,316 INFO L225 Difference]: With dead ends: 83 [2021-11-09 09:52:56,317 INFO L226 Difference]: Without dead ends: 83 [2021-11-09 09:52:56,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:52:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-09 09:52:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-09 09:52:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2021-11-09 09:52:56,323 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 41 [2021-11-09 09:52:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:56,323 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2021-11-09 09:52:56,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:52:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2021-11-09 09:52:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 09:52:56,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:56,326 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:56,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 09:52:56,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:52:56,542 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1289442752, now seen corresponding path program 1 times [2021-11-09 09:52:56,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:56,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177293464] [2021-11-09 09:52:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:56,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:56,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:56,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:52:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-09 09:52:56,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:56,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177293464] [2021-11-09 09:52:56,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177293464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:52:56,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:52:56,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:52:56,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478456558] [2021-11-09 09:52:56,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:52:56,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:52:56,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:52:56,660 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:56,882 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-11-09 09:52:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:52:56,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2021-11-09 09:52:56,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:56,884 INFO L225 Difference]: With dead ends: 81 [2021-11-09 09:52:56,885 INFO L226 Difference]: Without dead ends: 81 [2021-11-09 09:52:56,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:52:56,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-09 09:52:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-09 09:52:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-11-09 09:52:56,889 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 67 [2021-11-09 09:52:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:56,891 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-11-09 09:52:56,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-11-09 09:52:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 09:52:56,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:56,901 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:56,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:52:56,902 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:56,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2104421708, now seen corresponding path program 1 times [2021-11-09 09:52:56,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:56,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780997428] [2021-11-09 09:52:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:56,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:57,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:52:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:52:57,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:57,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780997428] [2021-11-09 09:52:57,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780997428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:57,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300509075] [2021-11-09 09:52:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:57,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:57,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:57,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:57,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:52:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:52:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:52:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-09 09:52:58,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300509075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:58,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:52:58,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-11-09 09:52:58,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129279975] [2021-11-09 09:52:58,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:52:58,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:52:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:52:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:52:58,060 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 21 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:52:58,914 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-11-09 09:52:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:52:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 21 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 69 [2021-11-09 09:52:58,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:52:58,916 INFO L225 Difference]: With dead ends: 91 [2021-11-09 09:52:58,917 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 09:52:58,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:52:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 09:52:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-11-09 09:52:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:52:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-11-09 09:52:58,929 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 69 [2021-11-09 09:52:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:52:58,930 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-11-09 09:52:58,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 21 states have internal predecessors, (78), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:52:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-11-09 09:52:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 09:52:58,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:52:58,932 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:52:58,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:52:59,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:52:59,156 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:52:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:52:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash 55366201, now seen corresponding path program 2 times [2021-11-09 09:52:59,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:52:59,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559739107] [2021-11-09 09:52:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:52:59,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:52:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:59,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:52:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:59,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:52:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:52:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:52:59,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:52:59,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559739107] [2021-11-09 09:52:59,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559739107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:52:59,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428387814] [2021-11-09 09:52:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:52:59,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:52:59,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:52:59,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:52:59,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:52:59,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:52:59,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:52:59,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:52:59,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-09 09:53:00,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428387814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:00,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:00,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-11-09 09:53:00,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788135291] [2021-11-09 09:53:00,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:53:00,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:53:00,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:53:00,101 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:00,747 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-11-09 09:53:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:53:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 75 [2021-11-09 09:53:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:00,749 INFO L225 Difference]: With dead ends: 97 [2021-11-09 09:53:00,749 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 09:53:00,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1094, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:53:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 09:53:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2021-11-09 09:53:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 87 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-09 09:53:00,755 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 75 [2021-11-09 09:53:00,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-09 09:53:00,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 23 states have internal predecessors, (84), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-09 09:53:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 09:53:00,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:00,757 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:00,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:00,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:53:00,958 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1297425364, now seen corresponding path program 3 times [2021-11-09 09:53:00,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:00,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158093171] [2021-11-09 09:53:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:00,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:53:01,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:01,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158093171] [2021-11-09 09:53:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158093171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:01,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923590885] [2021-11-09 09:53:01,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:53:01,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:01,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:01,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:01,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:53:01,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-09 09:53:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:53:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-09 09:53:02,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923590885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:02,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:02,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-11-09 09:53:02,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508129902] [2021-11-09 09:53:02,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:53:02,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:53:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=464, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:53:02,300 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:03,005 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-11-09 09:53:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:53:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 81 [2021-11-09 09:53:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:03,006 INFO L225 Difference]: With dead ends: 103 [2021-11-09 09:53:03,006 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 09:53:03,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=1264, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:53:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 09:53:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2021-11-09 09:53:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0555555555555556) internal successors, (95), 93 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-11-09 09:53:03,010 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 81 [2021-11-09 09:53:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:03,011 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-11-09 09:53:03,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 25 states have internal predecessors, (90), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-11-09 09:53:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-09 09:53:03,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:03,012 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:03,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:53:03,216 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:03,217 INFO L85 PathProgramCache]: Analyzing trace with hash 945828761, now seen corresponding path program 4 times [2021-11-09 09:53:03,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:03,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153569771] [2021-11-09 09:53:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:03,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:03,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:53:03,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:03,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153569771] [2021-11-09 09:53:03,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153569771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:03,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233430438] [2021-11-09 09:53:03,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:53:03,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:03,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:03,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:03,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:53:04,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:53:04,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:53:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-09 09:53:05,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233430438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:05,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:05,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-11-09 09:53:05,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861195434] [2021-11-09 09:53:05,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:53:05,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:53:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:53:05,168 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 27 states have internal predecessors, (96), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:06,055 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-11-09 09:53:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:53:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 27 states have internal predecessors, (96), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 87 [2021-11-09 09:53:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:06,058 INFO L225 Difference]: With dead ends: 109 [2021-11-09 09:53:06,058 INFO L226 Difference]: Without dead ends: 109 [2021-11-09 09:53:06,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=624, Invalid=1446, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:53:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-09 09:53:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-11-09 09:53:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-09 09:53:06,067 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 87 [2021-11-09 09:53:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:06,067 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-09 09:53:06,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.310344827586207) internal successors, (96), 27 states have internal predecessors, (96), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-09 09:53:06,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-09 09:53:06,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:06,071 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:06,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:06,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:53:06,288 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:06,289 INFO L85 PathProgramCache]: Analyzing trace with hash 970288372, now seen corresponding path program 5 times [2021-11-09 09:53:06,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:06,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688498792] [2021-11-09 09:53:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:06,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:06,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:06,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:53:06,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:06,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688498792] [2021-11-09 09:53:06,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688498792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:06,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553149878] [2021-11-09 09:53:06,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:53:06,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:06,580 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:06,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:53:11,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-09 09:53:11,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:53:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:53:11,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553149878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:11,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:11,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-11-09 09:53:11,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970502711] [2021-11-09 09:53:11,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:53:11,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:53:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:53:11,566 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:53:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:12,311 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-11-09 09:53:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:53:12,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 93 [2021-11-09 09:53:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:12,313 INFO L225 Difference]: With dead ends: 116 [2021-11-09 09:53:12,314 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 09:53:12,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:53:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 09:53:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2021-11-09 09:53:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-11-09 09:53:12,319 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 93 [2021-11-09 09:53:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:12,320 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-11-09 09:53:12,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:53:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-11-09 09:53:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-09 09:53:12,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:12,322 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:12,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:12,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:12,545 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1995072264, now seen corresponding path program 6 times [2021-11-09 09:53:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:12,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168086132] [2021-11-09 09:53:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:12,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:12,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:12,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-09 09:53:12,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:12,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168086132] [2021-11-09 09:53:12,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168086132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:12,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947910912] [2021-11-09 09:53:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:53:12,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:12,887 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:12,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:53:15,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-09 09:53:15,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:15,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:53:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-09 09:53:16,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947910912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:16,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:16,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-11-09 09:53:16,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444186235] [2021-11-09 09:53:16,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:53:16,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:16,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:53:16,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:53:16,233 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 32 states, 32 states have (on average 3.28125) internal successors, (105), 30 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:17,039 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-11-09 09:53:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:53:17,039 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 30 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 96 [2021-11-09 09:53:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:17,040 INFO L225 Difference]: With dead ends: 121 [2021-11-09 09:53:17,040 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 09:53:17,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=774, Invalid=1776, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:53:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 09:53:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-11-09 09:53:17,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 111 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-11-09 09:53:17,045 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 96 [2021-11-09 09:53:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:17,045 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-11-09 09:53:17,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.28125) internal successors, (105), 30 states have internal predecessors, (105), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-11-09 09:53:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-09 09:53:17,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:17,047 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:17,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:17,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:17,272 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1009774100, now seen corresponding path program 7 times [2021-11-09 09:53:17,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:17,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563957278] [2021-11-09 09:53:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:17,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:17,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:17,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:53:17,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:17,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563957278] [2021-11-09 09:53:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563957278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:17,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48841310] [2021-11-09 09:53:17,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:53:17,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:17,582 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:17,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:53:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:53:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-09 09:53:18,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48841310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:18,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:18,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-11-09 09:53:18,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471665458] [2021-11-09 09:53:18,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:53:18,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:53:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=778, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:53:18,619 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 33 states have internal predecessors, (114), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:19,585 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2021-11-09 09:53:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:53:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 33 states have internal predecessors, (114), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 105 [2021-11-09 09:53:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:19,587 INFO L225 Difference]: With dead ends: 127 [2021-11-09 09:53:19,587 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 09:53:19,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=2064, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:53:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 09:53:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2021-11-09 09:53:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 114 states have (on average 1.043859649122807) internal successors, (119), 117 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-11-09 09:53:19,593 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 105 [2021-11-09 09:53:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:19,594 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-11-09 09:53:19,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 33 states have internal predecessors, (114), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-11-09 09:53:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 09:53:19,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:19,598 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:19,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:19,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:19,812 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash -994963879, now seen corresponding path program 8 times [2021-11-09 09:53:19,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:19,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180789351] [2021-11-09 09:53:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:19,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:19,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:19,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:53:20,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:20,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180789351] [2021-11-09 09:53:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180789351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:20,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572261846] [2021-11-09 09:53:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:53:20,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:20,188 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:20,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:53:20,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:53:20,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:53:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-09 09:53:21,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572261846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:21,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:21,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2021-11-09 09:53:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446626918] [2021-11-09 09:53:21,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:53:21,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:53:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=941, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:53:21,419 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 36 states have internal predecessors, (118), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:22,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:22,741 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-11-09 09:53:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:53:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 36 states have internal predecessors, (118), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 111 [2021-11-09 09:53:22,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:22,746 INFO L225 Difference]: With dead ends: 133 [2021-11-09 09:53:22,746 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 09:53:22,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1025, Invalid=2635, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:53:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 09:53:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-11-09 09:53:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 123 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-09 09:53:22,754 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 111 [2021-11-09 09:53:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:22,754 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-09 09:53:22,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 36 states have internal predecessors, (118), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-09 09:53:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-09 09:53:22,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:22,757 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:22,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-09 09:53:22,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:53:22,972 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1040361268, now seen corresponding path program 9 times [2021-11-09 09:53:22,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:22,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005350593] [2021-11-09 09:53:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:22,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:23,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:53:23,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:23,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005350593] [2021-11-09 09:53:23,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005350593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:23,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467218335] [2021-11-09 09:53:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:53:23,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:23,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:23,442 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:23,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:53:26,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-09 09:53:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:53:26,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-09 09:53:27,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467218335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:27,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:27,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 09:53:27,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999619719] [2021-11-09 09:53:27,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:53:27,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:53:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1101, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:53:27,539 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 39 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:53:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:28,958 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2021-11-09 09:53:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:53:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 39 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 117 [2021-11-09 09:53:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:28,960 INFO L225 Difference]: With dead ends: 139 [2021-11-09 09:53:28,960 INFO L226 Difference]: Without dead ends: 139 [2021-11-09 09:53:28,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1178, Invalid=2982, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:53:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-09 09:53:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2021-11-09 09:53:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 129 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2021-11-09 09:53:28,967 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 117 [2021-11-09 09:53:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:28,968 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2021-11-09 09:53:28,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 39 states have internal predecessors, (127), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:53:28,969 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2021-11-09 09:53:28,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-09 09:53:28,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:28,970 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:29,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:29,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:53:29,184 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 167020473, now seen corresponding path program 10 times [2021-11-09 09:53:29,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:29,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4606055] [2021-11-09 09:53:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:29,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:29,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:29,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:53:29,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:29,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4606055] [2021-11-09 09:53:29,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4606055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:29,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433112787] [2021-11-09 09:53:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:53:29,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:29,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:29,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:53:40,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:53:40,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:53:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:53:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:53:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:53:41,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433112787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:41,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:53:41,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-11-09 09:53:41,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034505465] [2021-11-09 09:53:41,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 09:53:41,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:41,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 09:53:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1066, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:53:41,331 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 39 states have internal predecessors, (132), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:42,540 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2021-11-09 09:53:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:53:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 39 states have internal predecessors, (132), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2021-11-09 09:53:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:42,542 INFO L225 Difference]: With dead ends: 145 [2021-11-09 09:53:42,542 INFO L226 Difference]: Without dead ends: 145 [2021-11-09 09:53:42,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1242, Invalid=2790, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:53:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-09 09:53:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2021-11-09 09:53:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 135 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-11-09 09:53:42,549 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 123 [2021-11-09 09:53:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:42,550 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-11-09 09:53:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2195121951219514) internal successors, (132), 39 states have internal predecessors, (132), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:53:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-11-09 09:53:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-09 09:53:42,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:42,552 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:42,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:53:42,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:42,764 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:53:42,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash -26503084, now seen corresponding path program 11 times [2021-11-09 09:53:42,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:42,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283538413] [2021-11-09 09:53:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:42,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:42,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:42,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:53:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:53:43,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:43,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283538413] [2021-11-09 09:53:43,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283538413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:53:43,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977599331] [2021-11-09 09:53:43,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:53:43,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:53:43,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:43,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:53:43,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:54:40,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-09 09:54:40,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:54:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:54:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:54:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:54:40,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977599331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:40,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:54:40,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2021-11-09 09:54:40,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074417674] [2021-11-09 09:54:40,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:54:40,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:54:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:54:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:54:40,837 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 21 states have internal predecessors, (75), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:54:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:54:41,768 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2021-11-09 09:54:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:54:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 21 states have internal predecessors, (75), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 129 [2021-11-09 09:54:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:54:41,770 INFO L225 Difference]: With dead ends: 152 [2021-11-09 09:54:41,770 INFO L226 Difference]: Without dead ends: 152 [2021-11-09 09:54:41,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=679, Invalid=1213, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:54:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-09 09:54:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2021-11-09 09:54:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 135 states have (on average 1.037037037037037) internal successors, (140), 138 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:54:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-11-09 09:54:41,780 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2021-11-09 09:54:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:54:41,780 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-11-09 09:54:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 21 states have internal predecessors, (75), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:54:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-11-09 09:54:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-09 09:54:41,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:54:41,782 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:54:41,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-09 09:54:41,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:54:41,988 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:54:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:54:41,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2005453416, now seen corresponding path program 12 times [2021-11-09 09:54:41,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:54:41,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497708657] [2021-11-09 09:54:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:54:41,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:54:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:42,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:54:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:42,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:54:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:54:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-09 09:54:42,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:54:42,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497708657] [2021-11-09 09:54:42,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497708657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:54:42,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462698129] [2021-11-09 09:54:42,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:54:42,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:54:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:54:42,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:54:42,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:55:00,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-11-09 09:55:00,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:00,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:55:00,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 52 proven. 532 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-09 09:55:01,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462698129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:01,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:01,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-11-09 09:55:01,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338858959] [2021-11-09 09:55:01,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 09:55:01,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 09:55:01,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=1418, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:55:01,286 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 47 states, 47 states have (on average 3.127659574468085) internal successors, (147), 45 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:02,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:02,622 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2021-11-09 09:55:02,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:55:02,623 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.127659574468085) internal successors, (147), 45 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 132 [2021-11-09 09:55:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:02,624 INFO L225 Difference]: With dead ends: 161 [2021-11-09 09:55:02,624 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 09:55:02,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1613, Invalid=3643, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:55:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 09:55:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2021-11-09 09:55:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 147 states have (on average 1.034013605442177) internal successors, (152), 150 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:55:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2021-11-09 09:55:02,641 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 132 [2021-11-09 09:55:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:02,641 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2021-11-09 09:55:02,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.127659574468085) internal successors, (147), 45 states have internal predecessors, (147), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2021-11-09 09:55:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-09 09:55:02,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:02,653 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:02,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:02,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 09:55:02,872 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:55:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1688162067, now seen corresponding path program 13 times [2021-11-09 09:55:02,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:02,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459498916] [2021-11-09 09:55:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:02,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:02,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:55:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:55:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-09 09:55:03,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459498916] [2021-11-09 09:55:03,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459498916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705674171] [2021-11-09 09:55:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:55:03,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:03,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:03,357 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:03,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:55:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:04,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:55:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-09 09:55:05,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705674171] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:05,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:05,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-11-09 09:55:05,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291601373] [2021-11-09 09:55:05,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:55:05,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:05,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:55:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=1469, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:55:05,116 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 48 states, 48 states have (on average 3.1875) internal successors, (153), 46 states have internal predecessors, (153), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:06,532 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2021-11-09 09:55:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:55:06,533 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 46 states have internal predecessors, (153), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 144 [2021-11-09 09:55:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:06,534 INFO L225 Difference]: With dead ends: 169 [2021-11-09 09:55:06,534 INFO L226 Difference]: Without dead ends: 169 [2021-11-09 09:55:06,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1706, Invalid=3844, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:55:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-09 09:55:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2021-11-09 09:55:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 159 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:55:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-11-09 09:55:06,544 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 144 [2021-11-09 09:55:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:06,545 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-11-09 09:55:06,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 46 states have internal predecessors, (153), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:06,545 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-11-09 09:55:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-09 09:55:06,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:06,547 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:06,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:06,760 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:55:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash 586687124, now seen corresponding path program 14 times [2021-11-09 09:55:06,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:06,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603539174] [2021-11-09 09:55:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:06,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:06,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:55:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:06,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:55:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 09:55:07,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603539174] [2021-11-09 09:55:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603539174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459136772] [2021-11-09 09:55:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:55:07,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:07,285 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:07,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:55:08,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:55:08,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:55:08,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-11-09 09:55:09,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459136772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:09,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:09,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-11-09 09:55:09,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58759347] [2021-11-09 09:55:09,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 09:55:09,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 09:55:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=1646, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:55:09,141 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 49 states have internal predecessors, (162), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:10,595 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2021-11-09 09:55:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:55:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 49 states have internal predecessors, (162), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 153 [2021-11-09 09:55:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:10,596 INFO L225 Difference]: With dead ends: 175 [2021-11-09 09:55:10,596 INFO L226 Difference]: Without dead ends: 175 [2021-11-09 09:55:10,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1922, Invalid=4240, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 09:55:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-09 09:55:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-11-09 09:55:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 165 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:55:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2021-11-09 09:55:10,603 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 153 [2021-11-09 09:55:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:10,604 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2021-11-09 09:55:10,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 49 states have internal predecessors, (162), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2021-11-09 09:55:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-09 09:55:10,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:10,606 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:10,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:10,816 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:55:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2034621479, now seen corresponding path program 15 times [2021-11-09 09:55:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115757044] [2021-11-09 09:55:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:10,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:10,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:55:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:10,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:55:10,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-11-09 09:55:11,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:11,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115757044] [2021-11-09 09:55:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115757044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:11,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904106485] [2021-11-09 09:55:11,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:55:11,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:11,335 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:11,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:55:26,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-09 09:55:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:55:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:55:26,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:55:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2021-11-09 09:55:27,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904106485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:27,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:55:27,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-11-09 09:55:27,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205745377] [2021-11-09 09:55:27,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:55:27,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:55:27,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:55:27,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=1777, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:55:27,534 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 51 states have internal predecessors, (168), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:55:29,251 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2021-11-09 09:55:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:55:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 51 states have internal predecessors, (168), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 159 [2021-11-09 09:55:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:55:29,253 INFO L225 Difference]: With dead ends: 181 [2021-11-09 09:55:29,253 INFO L226 Difference]: Without dead ends: 181 [2021-11-09 09:55:29,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2076, Invalid=4566, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 09:55:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-09 09:55:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-11-09 09:55:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 171 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:55:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-11-09 09:55:29,260 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 159 [2021-11-09 09:55:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:55:29,260 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-11-09 09:55:29,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.169811320754717) internal successors, (168), 51 states have internal predecessors, (168), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:55:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-11-09 09:55:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-09 09:55:29,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:55:29,262 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:55:29,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:55:29,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:55:29,488 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:55:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:55:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash 282573748, now seen corresponding path program 16 times [2021-11-09 09:55:29,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:55:29,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029678655] [2021-11-09 09:55:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:55:29,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:55:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:55:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:55:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:55:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-09 09:55:30,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:55:30,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029678655] [2021-11-09 09:55:30,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029678655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:55:30,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971435730] [2021-11-09 09:55:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:55:30,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:55:30,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:55:30,056 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:55:30,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:56:44,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:56:44,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:56:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:56:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:56:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-09 09:56:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971435730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:56:45,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:56:45,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 55 [2021-11-09 09:56:45,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657599169] [2021-11-09 09:56:45,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 09:56:45,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:56:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 09:56:45,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=1913, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:56:45,223 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 55 states, 55 states have (on average 3.1636363636363636) internal successors, (174), 53 states have internal predecessors, (174), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:56:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:56:46,789 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2021-11-09 09:56:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 09:56:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1636363636363636) internal successors, (174), 53 states have internal predecessors, (174), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 165 [2021-11-09 09:56:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:56:46,793 INFO L225 Difference]: With dead ends: 187 [2021-11-09 09:56:46,793 INFO L226 Difference]: Without dead ends: 187 [2021-11-09 09:56:46,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2236, Invalid=4904, Unknown=0, NotChecked=0, Total=7140 [2021-11-09 09:56:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-09 09:56:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-11-09 09:56:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 174 states have (on average 1.028735632183908) internal successors, (179), 177 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:56:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2021-11-09 09:56:46,801 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 165 [2021-11-09 09:56:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:56:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2021-11-09 09:56:46,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1636363636363636) internal successors, (174), 53 states have internal predecessors, (174), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 09:56:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2021-11-09 09:56:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-09 09:56:46,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:56:46,804 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:56:46,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:56:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:56:47,024 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr7ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-09 09:56:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:56:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1322468039, now seen corresponding path program 17 times [2021-11-09 09:56:47,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:56:47,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814896064] [2021-11-09 09:56:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:56:47,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:56:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:56:47,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:56:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:56:47,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-09 09:56:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:56:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-11-09 09:56:47,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:56:47,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814896064] [2021-11-09 09:56:47,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814896064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:56:47,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303335186] [2021-11-09 09:56:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:56:47,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:56:47,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:56:47,619 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:56:47,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9767c04-b808-40e8-a524-043725a8dd54/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process