./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:38:24,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:38:24,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:38:24,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:38:24,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:38:24,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:38:24,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:38:24,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:38:24,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:38:24,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:38:24,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:38:24,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:38:24,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:38:24,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:38:24,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:38:24,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:38:24,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:38:24,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:38:24,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:38:24,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:38:24,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:38:24,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:38:24,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:38:24,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:38:24,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:38:24,520 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:38:24,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:38:24,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:38:24,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:38:24,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:38:24,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:38:24,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:38:24,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:38:24,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:38:24,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:38:24,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:38:24,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:38:24,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:38:24,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:38:24,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:38:24,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:38:24,541 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:38:24,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:38:24,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:38:24,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:38:24,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:38:24,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:38:24,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:38:24,610 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:38:24,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:38:24,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:38:24,611 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:38:24,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:38:24,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:38:24,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:38:24,613 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:38:24,613 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:38:24,614 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:38:24,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:38:24,614 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:38:24,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:38:24,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:38:24,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:38:24,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:38:24,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:38:24,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:38:24,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:38:24,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:38:24,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:38:24,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:38:24,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:38:24,630 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_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2021-11-07 07:38:24,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:38:24,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:38:25,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:38:25,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:38:25,004 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:38:25,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-07 07:38:25,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/d79b7c38a/c7a14fd2d27f4b979e7c9cc671bd76c8/FLAG3462c16ca [2021-11-07 07:38:25,869 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:38:25,870 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-07 07:38:25,886 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/d79b7c38a/c7a14fd2d27f4b979e7c9cc671bd76c8/FLAG3462c16ca [2021-11-07 07:38:26,081 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/d79b7c38a/c7a14fd2d27f4b979e7c9cc671bd76c8 [2021-11-07 07:38:26,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:38:26,089 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:38:26,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:26,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:38:26,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:38:26,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d8fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26, skipping insertion in model container [2021-11-07 07:38:26,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:38:26,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:38:26,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:26,653 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:38:26,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:26,763 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:38:26,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26 WrapperNode [2021-11-07 07:38:26,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:26,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:38:26,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:38:26,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:38:26,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:38:26,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:38:26,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:38:26,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:38:26,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (1/1) ... [2021-11-07 07:38:26,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:38:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:26,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:38:27,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:38:27,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:38:27,027 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:38:27,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:38:27,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:38:27,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 07:38:27,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 07:38:27,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 07:38:27,030 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-07 07:38:27,030 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:38:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:38:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:38:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:38:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:38:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:38:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:38:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:38:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:38:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:38:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:38:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:38:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:38:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:38:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:38:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:38:27,034 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:38:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:38:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:38:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:38:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:38:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:38:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:38:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:38:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:38:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 07:38:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 07:38:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 07:38:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:38:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:38:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:38:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:38:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:38:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:38:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:38:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:38:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:38:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:38:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:38:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:38:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:38:27,041 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:38:27,042 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:38:27,043 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:38:27,043 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:38:27,043 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:38:27,044 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:38:27,044 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:38:27,044 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:38:27,044 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:38:27,045 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:38:27,045 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:38:27,045 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:38:27,045 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:38:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:38:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:38:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:38:27,047 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:38:27,047 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:38:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:38:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:38:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:38:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:38:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:38:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:38:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:38:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:38:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:38:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:38:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:38:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:38:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:38:27,053 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:38:27,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:38:27,054 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:38:27,054 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:38:27,054 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:38:27,054 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:38:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:38:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:38:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:38:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:38:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:38:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:38:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:38:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:38:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:38:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:38:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:38:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:38:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:38:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:38:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:38:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:38:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:38:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:38:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:38:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:38:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:38:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:38:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:38:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:38:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:38:27,061 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:38:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:38:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:38:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:38:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:38:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:38:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:38:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:38:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:38:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:38:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 07:38:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-07 07:38:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:38:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:38:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:38:27,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:38:27,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 07:38:27,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:38:27,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:38:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:38:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:38:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:38:27,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:38:27,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:38:27,822 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 07:38:27,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:27 BoogieIcfgContainer [2021-11-07 07:38:27,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:38:27,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:38:27,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:38:27,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:38:27,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:38:26" (1/3) ... [2021-11-07 07:38:27,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcca873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:38:27, skipping insertion in model container [2021-11-07 07:38:27,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:26" (2/3) ... [2021-11-07 07:38:27,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bcca873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:38:27, skipping insertion in model container [2021-11-07 07:38:27,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:27" (3/3) ... [2021-11-07 07:38:27,847 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-11-07 07:38:27,853 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:38:27,853 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-07 07:38:27,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:38:27,913 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:38:27,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-07 07:38:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 82 states have internal predecessors, (88), 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) [2021-11-07 07:38:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:38:27,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:27,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:27,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash 726856395, now seen corresponding path program 1 times [2021-11-07 07:38:27,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:27,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566670090] [2021-11-07 07:38:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:27,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:28,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:28,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:28,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566670090] [2021-11-07 07:38:28,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566670090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:28,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:28,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:28,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575914117] [2021-11-07 07:38:28,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:38:28,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:28,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:38:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:28,282 INFO L87 Difference]: Start difference. First operand has 89 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 82 states have internal predecessors, (88), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-07 07:38:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:28,577 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-11-07 07:38:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:38:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 8 [2021-11-07 07:38:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:28,593 INFO L225 Difference]: With dead ends: 89 [2021-11-07 07:38:28,593 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:38:28,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:38:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:38:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-07 07:38:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 40 states have (on average 2.1) internal successors, (84), 80 states have internal predecessors, (84), 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) [2021-11-07 07:38:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-11-07 07:38:28,663 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 8 [2021-11-07 07:38:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:28,664 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-11-07 07:38:28,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-07 07:38:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-11-07 07:38:28,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:38:28,666 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:28,666 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:28,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:38:28,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:28,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1057814912, now seen corresponding path program 1 times [2021-11-07 07:38:28,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:28,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318253575] [2021-11-07 07:38:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:28,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:28,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:28,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:28,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318253575] [2021-11-07 07:38:28,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318253575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:28,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:28,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:28,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543037624] [2021-11-07 07:38:28,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:38:28,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:38:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:38:28,948 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-07 07:38:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:29,289 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-11-07 07:38:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:38:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 9 [2021-11-07 07:38:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:29,293 INFO L225 Difference]: With dead ends: 78 [2021-11-07 07:38:29,293 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 07:38:29,296 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 07:38:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-07 07:38:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.9) internal successors, (76), 72 states have internal predecessors, (76), 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) [2021-11-07 07:38:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-07 07:38:29,326 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 9 [2021-11-07 07:38:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:29,327 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-07 07:38:29,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-07 07:38:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-07 07:38:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:38:29,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:29,329 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:29,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:38:29,331 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1057814913, now seen corresponding path program 1 times [2021-11-07 07:38:29,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:29,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628082698] [2021-11-07 07:38:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:29,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:29,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:29,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:29,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628082698] [2021-11-07 07:38:29,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628082698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:29,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:29,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:29,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847864006] [2021-11-07 07:38:29,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:38:29,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:29,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:38:29,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:38:29,568 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-07 07:38:29,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:29,962 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-11-07 07:38:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:38:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 9 [2021-11-07 07:38:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:29,973 INFO L225 Difference]: With dead ends: 96 [2021-11-07 07:38:29,973 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:38:29,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:38:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2021-11-07 07:38:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 77 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) [2021-11-07 07:38:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-11-07 07:38:29,999 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 9 [2021-11-07 07:38:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:29,999 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-11-07 07:38:30,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-07 07:38:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-11-07 07:38:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:38:30,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:30,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:30,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:38:30,002 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1567476021, now seen corresponding path program 1 times [2021-11-07 07:38:30,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:30,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32184418] [2021-11-07 07:38:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:30,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:30,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:30,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:30,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32184418] [2021-11-07 07:38:30,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32184418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:30,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:30,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:30,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698465600] [2021-11-07 07:38:30,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:38:30,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:38:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:38:30,103 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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) [2021-11-07 07:38:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:30,356 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-07 07:38:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:38:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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 10 [2021-11-07 07:38:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:30,358 INFO L225 Difference]: With dead ends: 79 [2021-11-07 07:38:30,359 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 07:38:30,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:38:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 07:38:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 07:38:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.653061224489796) internal successors, (81), 73 states have internal predecessors, (81), 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) [2021-11-07 07:38:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-11-07 07:38:30,366 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 10 [2021-11-07 07:38:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-11-07 07:38:30,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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) [2021-11-07 07:38:30,381 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-11-07 07:38:30,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:38:30,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:30,382 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:30,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:38:30,383 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1567476020, now seen corresponding path program 1 times [2021-11-07 07:38:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:30,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387595724] [2021-11-07 07:38:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:30,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:30,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:30,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:30,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387595724] [2021-11-07 07:38:30,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387595724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:30,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:30,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:38:30,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967648561] [2021-11-07 07:38:30,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:38:30,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:38:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:38:30,531 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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) [2021-11-07 07:38:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:30,700 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-11-07 07:38:30,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:38:30,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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 10 [2021-11-07 07:38:30,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:30,702 INFO L225 Difference]: With dead ends: 75 [2021-11-07 07:38:30,703 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 07:38:30,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:38:30,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 07:38:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-07 07:38:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 69 states have internal predecessors, (76), 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) [2021-11-07 07:38:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-11-07 07:38:30,710 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 10 [2021-11-07 07:38:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:30,711 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-11-07 07:38:30,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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) [2021-11-07 07:38:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-11-07 07:38:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:38:30,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:30,713 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:30,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:38:30,714 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1388861269, now seen corresponding path program 1 times [2021-11-07 07:38:30,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:30,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44988335] [2021-11-07 07:38:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:30,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:30,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:30,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44988335] [2021-11-07 07:38:30,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44988335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:30,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:30,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 07:38:30,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327080946] [2021-11-07 07:38:30,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:38:30,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:38:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:38:30,926 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-11-07 07:38:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:31,325 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-11-07 07:38:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:38:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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 15 [2021-11-07 07:38:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:31,327 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:38:31,328 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:38:31,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:38:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:38:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-11-07 07:38:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.490909090909091) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2021-11-07 07:38:31,343 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 15 [2021-11-07 07:38:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:31,345 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2021-11-07 07:38:31,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-11-07 07:38:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2021-11-07 07:38:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:38:31,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:31,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:31,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:38:31,347 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:31,348 INFO L85 PathProgramCache]: Analyzing trace with hash -104748240, now seen corresponding path program 1 times [2021-11-07 07:38:31,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:31,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187239510] [2021-11-07 07:38:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:31,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:31,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:31,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187239510] [2021-11-07 07:38:31,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187239510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:31,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:31,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:38:31,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912514860] [2021-11-07 07:38:31,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:38:31,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:31,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:38:31,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:31,534 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-11-07 07:38:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:31,760 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-07 07:38:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:38:31,761 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 16 [2021-11-07 07:38:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:31,762 INFO L225 Difference]: With dead ends: 81 [2021-11-07 07:38:31,762 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 07:38:31,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:38:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 07:38:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-11-07 07:38:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5) internal successors, (78), 71 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-11-07 07:38:31,770 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 16 [2021-11-07 07:38:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:31,771 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-11-07 07:38:31,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-11-07 07:38:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-11-07 07:38:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:38:31,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:31,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:31,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:38:31,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:31,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1762060380, now seen corresponding path program 1 times [2021-11-07 07:38:31,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:31,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485020796] [2021-11-07 07:38:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:31,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:31,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:31,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:31,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485020796] [2021-11-07 07:38:31,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485020796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:31,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:31,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:38:31,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251682004] [2021-11-07 07:38:31,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:38:31,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:38:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:38:31,962 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:32,314 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-11-07 07:38:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:38:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-07 07:38:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:32,317 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:38:32,317 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:38:32,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:38:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:38:32,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2021-11-07 07:38:32,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-11-07 07:38:32,325 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 24 [2021-11-07 07:38:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:32,326 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-11-07 07:38:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-11-07 07:38:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:38:32,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:32,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:32,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:38:32,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1762060381, now seen corresponding path program 1 times [2021-11-07 07:38:32,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:32,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448888199] [2021-11-07 07:38:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:32,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:32,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:32,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:32,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:32,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448888199] [2021-11-07 07:38:32,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448888199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:32,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:32,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:38:32,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459205935] [2021-11-07 07:38:32,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:38:32,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:38:32,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:38:32,553 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:32,928 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-11-07 07:38:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:38:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-07 07:38:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:32,930 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:38:32,930 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:38:32,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:38:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:38:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-11-07 07:38:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-07 07:38:32,937 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 24 [2021-11-07 07:38:32,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:32,937 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-07 07:38:32,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-07 07:38:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:38:32,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:32,939 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:32,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:38:32,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1143077172, now seen corresponding path program 1 times [2021-11-07 07:38:32,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:32,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757994893] [2021-11-07 07:38:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:32,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:33,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:33,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757994893] [2021-11-07 07:38:33,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757994893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:33,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:33,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:38:33,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521584666] [2021-11-07 07:38:33,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:38:33,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:38:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:33,123 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:33,401 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-11-07 07:38:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:38:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-07 07:38:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:33,407 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:38:33,407 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:38:33,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:38:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:38:33,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 07:38:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.434782608695652) internal successors, (66), 63 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-11-07 07:38:33,421 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 26 [2021-11-07 07:38:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:33,422 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-11-07 07:38:33,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-11-07 07:38:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:38:33,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:33,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:33,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:38:33,424 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 450500818, now seen corresponding path program 1 times [2021-11-07 07:38:33,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:33,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624528382] [2021-11-07 07:38:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:33,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:33,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:33,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624528382] [2021-11-07 07:38:33,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624528382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:33,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:33,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:38:33,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170194268] [2021-11-07 07:38:33,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:38:33,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:38:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:33,603 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:33,880 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-07 07:38:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:38:33,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2021-11-07 07:38:33,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:33,882 INFO L225 Difference]: With dead ends: 69 [2021-11-07 07:38:33,883 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 07:38:33,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:38:33,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 07:38:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 07:38:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-07 07:38:33,887 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 27 [2021-11-07 07:38:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:33,888 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-07 07:38:33,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-07 07:38:33,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:38:33,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:33,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:33,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:38:33,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1080623549, now seen corresponding path program 1 times [2021-11-07 07:38:33,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:33,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350990192] [2021-11-07 07:38:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:33,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:34,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:34,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350990192] [2021-11-07 07:38:34,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350990192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:34,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:34,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:38:34,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400287278] [2021-11-07 07:38:34,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:38:34,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:38:34,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:34,043 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:34,334 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-11-07 07:38:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:38:34,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-07 07:38:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:34,336 INFO L225 Difference]: With dead ends: 68 [2021-11-07 07:38:34,336 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 07:38:34,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:38:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 07:38:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-07 07:38:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.391304347826087) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-11-07 07:38:34,341 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 28 [2021-11-07 07:38:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:34,342 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-11-07 07:38:34,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-11-07 07:38:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:38:34,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:34,344 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:34,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:38:34,345 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1016891037, now seen corresponding path program 1 times [2021-11-07 07:38:34,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:34,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515673736] [2021-11-07 07:38:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:34,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:34,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:34,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515673736] [2021-11-07 07:38:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515673736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:34,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961867395] [2021-11-07 07:38:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:34,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:34,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:34,581 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:34,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:38:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:38:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:35,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 07:38:35,228 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-07 07:38:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-07 07:38:35,446 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:38:35,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-07 07:38:35,654 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:38:35,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-11-07 07:38:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:35,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961867395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:35,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:35,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-07 07:38:35,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037766434] [2021-11-07 07:38:35,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:38:35,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:38:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:38:35,713 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:38:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:36,689 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-11-07 07:38:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:38:36,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-07 07:38:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:36,691 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:38:36,691 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 07:38:36,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:38:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 07:38:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-07 07:38:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.34) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-07 07:38:36,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 29 [2021-11-07 07:38:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:36,697 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-07 07:38:36,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:38:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-07 07:38:36,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:38:36,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:36,699 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:36,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 07:38:36,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:36,918 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1016891038, now seen corresponding path program 1 times [2021-11-07 07:38:36,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:36,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720229811] [2021-11-07 07:38:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:36,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:37,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:37,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:37,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:37,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720229811] [2021-11-07 07:38:37,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720229811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:37,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543707941] [2021-11-07 07:38:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:37,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:37,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:37,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:37,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:38:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:37,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:38:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:37,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 07:38:37,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 07:38:37,906 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 07:38:37,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 07:38:37,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-07 07:38:38,075 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:38:38,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2021-11-07 07:38:38,094 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:38:38,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 46 [2021-11-07 07:38:38,331 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:38:38,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2021-11-07 07:38:38,341 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:38:38,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-11-07 07:38:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543707941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:38,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:38,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-07 07:38:38,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689658463] [2021-11-07 07:38:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:38:38,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:38,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:38:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:38:38,403 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:38:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:39,516 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-07 07:38:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:38:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-07 07:38:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:39,518 INFO L225 Difference]: With dead ends: 73 [2021-11-07 07:38:39,518 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 07:38:39,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:38:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 07:38:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-07 07:38:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.32) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-07 07:38:39,524 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 29 [2021-11-07 07:38:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:39,524 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-07 07:38:39,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:38:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-07 07:38:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:38:39,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:39,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:39,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 07:38:39,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:38:39,744 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -860408268, now seen corresponding path program 1 times [2021-11-07 07:38:39,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:39,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268264294] [2021-11-07 07:38:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:39,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:39,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:39,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:39,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268264294] [2021-11-07 07:38:39,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268264294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:39,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:39,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:38:39,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326991416] [2021-11-07 07:38:39,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:38:39,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:38:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:39,852 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:40,071 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-11-07 07:38:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:38:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-11-07 07:38:40,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:40,073 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:38:40,074 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:38:40,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:38:40,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:38:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 07:38:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.3) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-07 07:38:40,078 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 29 [2021-11-07 07:38:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:40,079 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-07 07:38:40,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:38:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-07 07:38:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:38:40,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:40,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:40,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:38:40,092 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash -902852448, now seen corresponding path program 1 times [2021-11-07 07:38:40,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:40,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601853877] [2021-11-07 07:38:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:40,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:40,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:40,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:40,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:40,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601853877] [2021-11-07 07:38:40,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601853877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:40,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:40,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 07:38:40,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602284426] [2021-11-07 07:38:40,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:38:40,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:38:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:38:40,310 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 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) [2021-11-07 07:38:40,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:40,573 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-11-07 07:38:40,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:38:40,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 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) Word has length 30 [2021-11-07 07:38:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:40,574 INFO L225 Difference]: With dead ends: 69 [2021-11-07 07:38:40,575 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 07:38:40,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:38:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 07:38:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 07:38:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.28) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-07 07:38:40,579 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 30 [2021-11-07 07:38:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:40,579 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-07 07:38:40,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 2 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) [2021-11-07 07:38:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-07 07:38:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:38:40,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:40,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:40,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:38:40,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -902852447, now seen corresponding path program 1 times [2021-11-07 07:38:40,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:40,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496063903] [2021-11-07 07:38:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:40,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:40,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:40,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-07 07:38:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:40,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:40,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496063903] [2021-11-07 07:38:40,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496063903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:40,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:40,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:40,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103183884] [2021-11-07 07:38:40,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:38:40,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:38:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:38:40,699 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-11-07 07:38:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:40,850 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-11-07 07:38:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 30 [2021-11-07 07:38:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:40,852 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:38:40,852 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:38:40,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:38:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-07 07:38:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.18) internal successors, (59), 57 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:38:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-11-07 07:38:40,861 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 30 [2021-11-07 07:38:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:40,862 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-11-07 07:38:40,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-11-07 07:38:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-11-07 07:38:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:38:40,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:40,863 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:40,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:38:40,864 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash 281339622, now seen corresponding path program 1 times [2021-11-07 07:38:40,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:40,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540139558] [2021-11-07 07:38:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:40,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:40,948 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:41,031 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:41,033 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 07:38:41,035 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 07:38:41,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 07:38:41,037 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 07:38:41,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-07 07:38:41,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-07 07:38:41,038 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-07 07:38:41,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-07 07:38:41,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-07 07:38:41,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-07 07:38:41,039 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:38:41,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:38:41,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:38:41,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-07 07:38:41,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-11-07 07:38:41,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-11-07 07:38:41,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-11-07 07:38:41,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-11-07 07:38:41,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-11-07 07:38:41,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-11-07 07:38:41,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-11-07 07:38:41,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-11-07 07:38:41,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-11-07 07:38:41,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:38:41,043 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:38:41,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:38:41,044 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-11-07 07:38:41,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-11-07 07:38:41,045 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-11-07 07:38:41,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-11-07 07:38:41,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-11-07 07:38:41,046 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-11-07 07:38:41,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-11-07 07:38:41,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-11-07 07:38:41,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-11-07 07:38:41,047 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-11-07 07:38:41,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-11-07 07:38:41,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-11-07 07:38:41,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-11-07 07:38:41,048 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-11-07 07:38:41,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-11-07 07:38:41,049 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-11-07 07:38:41,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:38:41,055 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:41,062 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:38:41,097 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 07:38:41,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:38:41 BoogieIcfgContainer [2021-11-07 07:38:41,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:38:41,128 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:38:41,128 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:38:41,128 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:38:41,129 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:27" (3/4) ... [2021-11-07 07:38:41,133 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 07:38:41,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:38:41,134 INFO L168 Benchmark]: Toolchain (without parser) took 15045.00 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 63.9 MB in the beginning and 118.4 MB in the end (delta: -54.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-11-07 07:38:41,135 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory is still 49.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:38:41,136 INFO L168 Benchmark]: CACSL2BoogieTranslator took 672.50 ms. Allocated memory is still 88.1 MB. Free memory was 63.6 MB in the beginning and 56.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:38:41,136 INFO L168 Benchmark]: Boogie Preprocessor took 143.06 ms. Allocated memory is still 88.1 MB. Free memory was 56.0 MB in the beginning and 53.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 07:38:41,137 INFO L168 Benchmark]: RCFGBuilder took 924.14 ms. Allocated memory is still 88.1 MB. Free memory was 53.2 MB in the beginning and 50.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-07 07:38:41,138 INFO L168 Benchmark]: TraceAbstraction took 13291.03 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 50.2 MB in the beginning and 118.4 MB in the end (delta: -68.2 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2021-11-07 07:38:41,138 INFO L168 Benchmark]: Witness Printer took 5.24 ms. Allocated memory is still 157.3 MB. Free memory is still 118.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:38:41,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory is still 49.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 672.50 ms. Allocated memory is still 88.1 MB. Free memory was 63.6 MB in the beginning and 56.0 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 143.06 ms. Allocated memory is still 88.1 MB. Free memory was 56.0 MB in the beginning and 53.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 924.14 ms. Allocated memory is still 88.1 MB. Free memory was 53.2 MB in the beginning and 50.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13291.03 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 50.2 MB in the beginning and 118.4 MB in the end (delta: -68.2 MB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.24 ms. Allocated memory is still 157.3 MB. Free memory is still 118.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={3:0}] [L541] CALL append(&list) VAL [plist={3:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={1:0}, plist={3:0}, plist={3:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={1:0}, plist={3:0}, plist={3:0}] [L532] EXPR item->next VAL [item={1:0}, item->next={0:0}, plist={3:0}, plist={3:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={-1:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={-1:0}, plist={3:0}, plist={3:0}] [L535] *plist = item VAL [item={1:0}, plist={3:0}, plist={3:0}] [L541] RET append(&list) VAL [list={3:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={1:0}, list={3:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={1:0}, list={3:0}] [L544] EXPR list->next VAL [\read(*list)={1:0}, list={3:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={3:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={3:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={3:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 107 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 13.1s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 797 SDtfs, 731 SDslu, 2258 SDs, 0 SdLazy, 3855 SolverSat, 162 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 261 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=0, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 445 NumberOfCodeBlocks, 445 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 392 ConstructedInterpolants, 12 QuantifiedInterpolants, 3743 SizeOfPredicates, 32 NumberOfNonLiveVariables, 450 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 19 InterpolantComputations, 15 PerfectInterpolantSequences, 6/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 07:38:41,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:38:44,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:38:44,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:38:44,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:38:44,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:38:44,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:38:44,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:38:44,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:38:44,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:38:44,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:38:44,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:38:44,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:38:44,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:38:44,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:38:44,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:38:44,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:38:44,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:38:44,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:38:44,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:38:44,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:38:44,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:38:44,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:38:44,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:38:44,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:38:44,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:38:44,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:38:44,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:38:44,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:38:44,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:38:44,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:38:44,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:38:44,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:38:44,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:38:44,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:38:44,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:38:44,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:38:44,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:38:44,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:38:44,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:38:44,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:38:44,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:38:44,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 07:38:44,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:38:44,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:38:44,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:38:44,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:38:44,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:38:44,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:38:44,344 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:38:44,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:38:44,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:38:44,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:38:44,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:38:44,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:38:44,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:38:44,346 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:38:44,347 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:38:44,347 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:38:44,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:38:44,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:38:44,348 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 07:38:44,348 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 07:38:44,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:38:44,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:38:44,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:38:44,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:38:44,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:38:44,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:38:44,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:38:44,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:38:44,351 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 07:38:44,351 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 07:38:44,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:38:44,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 07:38:44,352 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1228d922512a0e9364273220ccc1e5afc3bfb7c0e22f10439a1ba902492e71b2 [2021-11-07 07:38:44,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:38:44,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:38:44,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:38:44,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:38:44,859 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:38:44,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-07 07:38:44,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/e82b67d93/97924987868c4d81a6635a6e0129c223/FLAG613306a47 [2021-11-07 07:38:45,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:38:45,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/sv-benchmarks/c/memsafety/test-0232-1.i [2021-11-07 07:38:45,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/e82b67d93/97924987868c4d81a6635a6e0129c223/FLAG613306a47 [2021-11-07 07:38:45,936 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/data/e82b67d93/97924987868c4d81a6635a6e0129c223 [2021-11-07 07:38:45,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:38:45,946 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:38:45,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:45,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:38:45,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:38:45,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:45" (1/1) ... [2021-11-07 07:38:45,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@201dceda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:45, skipping insertion in model container [2021-11-07 07:38:45,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:45" (1/1) ... [2021-11-07 07:38:45,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:38:46,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:38:46,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:46,612 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:38:46,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:46,725 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:38:46,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46 WrapperNode [2021-11-07 07:38:46,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:46,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:38:46,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:38:46,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:38:46,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:38:46,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:38:46,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:38:46,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:38:46,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (1/1) ... [2021-11-07 07:38:46,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:38:46,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:46,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:38:46,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:38:46,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:38:46,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:38:46,970 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:38:46,971 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:38:46,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:38:46,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 07:38:46,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 07:38:46,973 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 07:38:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-07 07:38:46,974 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:38:46,974 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:38:46,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:38:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:38:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:38:46,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:38:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:38:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:38:46,976 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:38:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:38:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:38:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:38:46,977 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:38:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:38:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:38:46,978 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:38:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:38:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:38:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:38:46,979 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:38:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:38:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:38:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:38:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:38:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:38:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 07:38:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 07:38:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 07:38:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:38:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:38:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:38:46,982 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:38:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:38:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:38:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:38:46,983 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:38:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:38:46,984 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:38:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:38:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:38:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:38:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:38:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:38:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:38:46,988 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:38:46,988 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:38:46,988 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:38:46,988 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:38:46,989 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:38:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:38:47,013 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:38:47,014 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:38:47,014 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:38:47,014 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:38:47,015 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:38:47,016 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:38:47,016 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:38:47,017 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:38:47,018 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:38:47,018 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:38:47,018 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:38:47,018 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:38:47,019 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:38:47,019 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:38:47,019 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:38:47,019 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:38:47,020 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:38:47,020 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:38:47,020 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:38:47,020 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:38:47,021 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:38:47,021 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:38:47,021 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:38:47,021 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:38:47,021 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:38:47,022 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:38:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:38:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:38:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:38:47,023 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:38:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:38:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:38:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:38:47,024 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:38:47,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:38:47,025 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:38:47,025 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:38:47,025 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:38:47,025 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:38:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:38:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:38:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:38:47,026 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:38:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:38:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:38:47,027 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:38:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:38:47,028 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:38:47,029 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:38:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:38:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:38:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:38:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:38:47,030 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:38:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:38:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:38:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:38:47,031 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:38:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:38:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:38:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:38:47,032 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:38:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:38:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 07:38:47,033 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-07 07:38:47,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:38:47,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:38:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:38:47,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:38:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 07:38:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:38:47,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:38:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:38:47,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:38:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:38:47,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 07:38:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 07:38:48,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:38:48,010 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 07:38:48,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:48 BoogieIcfgContainer [2021-11-07 07:38:48,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:38:48,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:38:48,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:38:48,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:38:48,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:38:45" (1/3) ... [2021-11-07 07:38:48,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38206377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:38:48, skipping insertion in model container [2021-11-07 07:38:48,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:46" (2/3) ... [2021-11-07 07:38:48,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38206377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:38:48, skipping insertion in model container [2021-11-07 07:38:48,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:48" (3/3) ... [2021-11-07 07:38:48,045 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-1.i [2021-11-07 07:38:48,052 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:38:48,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-07 07:38:48,122 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:38:48,133 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:38:48,134 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-07 07:38:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 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) [2021-11-07 07:38:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:38:48,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:48,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:48,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:48,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1666262251, now seen corresponding path program 1 times [2021-11-07 07:38:48,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:38:48,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991115033] [2021-11-07 07:38:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:48,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:38:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:38:48,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:38:48,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:38:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:48,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 07:38:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:38:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:48,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:38:48,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991115033] [2021-11-07 07:38:48,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991115033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:48,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:48,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:38:48,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959453602] [2021-11-07 07:38:48,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:38:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:38:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:38:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:38:48,596 INFO L87 Difference]: Start difference. First operand has 88 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 81 states have internal predecessors, (87), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:38:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:48,619 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-11-07 07:38:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:38:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-11-07 07:38:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:48,631 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:38:48,631 INFO L226 Difference]: Without dead ends: 85 [2021-11-07 07:38:48,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:38:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-07 07:38:48,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-07 07:38:48,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 39 states have (on average 2.128205128205128) internal successors, (83), 79 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) [2021-11-07 07:38:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-07 07:38:48,694 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 8 [2021-11-07 07:38:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:48,695 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-07 07:38:48,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:38:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-07 07:38:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:38:48,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:48,696 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:48,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:48,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:38:48,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting appendErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash 114625428, now seen corresponding path program 1 times [2021-11-07 07:38:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:38:48,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211882405] [2021-11-07 07:38:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:48,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:38:48,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:38:48,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:38:48,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:38:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:49,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:38:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:49,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:38:49,243 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 07:38:49,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-07 07:38:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:49,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:38:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:49,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:38:49,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211882405] [2021-11-07 07:38:49,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211882405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:49,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:49,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:38:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173076389] [2021-11-07 07:38:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:38:49,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:38:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:38:49,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:38:49,419 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-11-07 07:38:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:49,988 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-11-07 07:38:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 9 [2021-11-07 07:38:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:49,992 INFO L225 Difference]: With dead ends: 77 [2021-11-07 07:38:49,992 INFO L226 Difference]: Without dead ends: 77 [2021-11-07 07:38:49,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:38:49,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-07 07:38:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-07 07:38:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 71 states have internal predecessors, (75), 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) [2021-11-07 07:38:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-07 07:38:50,005 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 9 [2021-11-07 07:38:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:50,006 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-07 07:38:50,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-11-07 07:38:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-07 07:38:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 07:38:50,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:50,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:50,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:50,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:38:50,213 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:38:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash 114625429, now seen corresponding path program 1 times [2021-11-07 07:38:50,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:38:50,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967569136] [2021-11-07 07:38:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:50,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:38:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:38:50,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:38:50,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:38:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:50,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:38:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:38:50,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:38:50,609 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:38:50,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-07 07:38:50,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 07:38:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-07 07:38:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:50,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:38:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:51,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:38:51,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967569136] [2021-11-07 07:38:51,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967569136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:51,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:51,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 07:38:51,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285123297] [2021-11-07 07:38:51,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:38:51,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:38:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:38:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:38:51,998 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 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) [2021-11-07 07:39:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:03,622 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-07 07:39:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 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 9 [2021-11-07 07:39:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:03,626 INFO L225 Difference]: With dead ends: 96 [2021-11-07 07:39:03,627 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:39:03,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:39:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:39:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-11-07 07:39:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.7555555555555555) 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) [2021-11-07 07:39:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-11-07 07:39:03,638 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 9 [2021-11-07 07:39:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:03,639 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-11-07 07:39:03,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 3 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) [2021-11-07 07:39:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-11-07 07:39:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:39:03,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:03,641 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:03,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:03,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:03,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash -741578931, now seen corresponding path program 1 times [2021-11-07 07:39:03,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:03,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62132564] [2021-11-07 07:39:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:03,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:03,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:03,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:39:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:04,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:39:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:04,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:39:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:04,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:04,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:04,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62132564] [2021-11-07 07:39:04,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62132564] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:04,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:04,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:39:04,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486114929] [2021-11-07 07:39:04,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:39:04,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:04,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:39:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:39:04,253 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:39:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:04,537 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-11-07 07:39:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:39:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 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 10 [2021-11-07 07:39:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:04,540 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:39:04,540 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 07:39:04,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:39:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 07:39:04,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-07 07:39:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 68 states have internal predecessors, (75), 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) [2021-11-07 07:39:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-11-07 07:39:04,549 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 10 [2021-11-07 07:39:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:04,549 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-11-07 07:39:04,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:39:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-11-07 07:39:04,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:39:04,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:04,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:04,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:04,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash -741578932, now seen corresponding path program 1 times [2021-11-07 07:39:04,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:04,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699771250] [2021-11-07 07:39:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:04,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:04,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:04,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 07:39:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:39:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:39:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:05,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:05,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699771250] [2021-11-07 07:39:05,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699771250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:05,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:05,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:39:05,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625509283] [2021-11-07 07:39:05,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:39:05,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:39:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:39:05,031 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:39:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:05,219 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-11-07 07:39:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:39:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 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 10 [2021-11-07 07:39:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:05,221 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:39:05,221 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:39:05,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:39:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:39:05,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 07:39:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 64 states have internal predecessors, (71), 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) [2021-11-07 07:39:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-11-07 07:39:05,229 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 10 [2021-11-07 07:39:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:05,229 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-11-07 07:39:05,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:39:05,229 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-11-07 07:39:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:39:05,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:05,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:05,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:05,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:05,431 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:05,431 INFO L85 PathProgramCache]: Analyzing trace with hash -164729953, now seen corresponding path program 1 times [2021-11-07 07:39:05,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:05,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090325150] [2021-11-07 07:39:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:05,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:05,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:05,434 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:05,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 07:39:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:39:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:05,992 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:39:05,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 40 [2021-11-07 07:39:06,032 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:39:06,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2021-11-07 07:39:06,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-07 07:39:06,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-07 07:39:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:06,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:06,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:06,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090325150] [2021-11-07 07:39:06,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090325150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:06,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:06,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-07 07:39:06,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015169140] [2021-11-07 07:39:06,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:39:06,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:39:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:39:06,430 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-07 07:39:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:07,408 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-07 07:39:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:39:07,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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 15 [2021-11-07 07:39:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:07,410 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:39:07,411 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 07:39:07,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:39:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 07:39:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-11-07 07:39:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 70 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-11-07 07:39:07,421 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 15 [2021-11-07 07:39:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:07,422 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-11-07 07:39:07,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2021-11-07 07:39:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-11-07 07:39:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:39:07,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:07,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:07,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 07:39:07,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:07,641 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 486538853, now seen corresponding path program 1 times [2021-11-07 07:39:07,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:07,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093957267] [2021-11-07 07:39:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:07,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:07,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:07,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:07,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 07:39:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:39:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:08,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 07:39:08,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-07 07:39:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:08,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:08,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-07 07:39:08,736 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:39:08,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2021-11-07 07:39:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:08,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:08,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093957267] [2021-11-07 07:39:08,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093957267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:08,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:08,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-07 07:39:08,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913373249] [2021-11-07 07:39:08,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:39:08,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:39:08,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:08,880 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:09,710 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-07 07:39:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-07 07:39:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:09,713 INFO L225 Difference]: With dead ends: 85 [2021-11-07 07:39:09,713 INFO L226 Difference]: Without dead ends: 85 [2021-11-07 07:39:09,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:39:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-07 07:39:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2021-11-07 07:39:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 69 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-11-07 07:39:09,731 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 23 [2021-11-07 07:39:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:09,733 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-11-07 07:39:09,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-11-07 07:39:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 07:39:09,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:09,735 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:09,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:09,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:09,951 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash 486538854, now seen corresponding path program 1 times [2021-11-07 07:39:09,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:09,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719908962] [2021-11-07 07:39:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:09,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:09,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:09,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:09,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 07:39:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:10,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:39:10,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:10,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 07:39:10,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 07:39:10,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-07 07:39:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-07 07:39:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:10,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:11,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2021-11-07 07:39:11,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2021-11-07 07:39:11,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-07 07:39:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 07:39:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:12,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:12,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719908962] [2021-11-07 07:39:12,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719908962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:12,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:12,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 07:39:12,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876100448] [2021-11-07 07:39:12,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:39:12,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:39:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:39:12,401 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:39:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:13,784 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-11-07 07:39:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:13,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-11-07 07:39:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:13,787 INFO L225 Difference]: With dead ends: 87 [2021-11-07 07:39:13,787 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 07:39:13,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:39:13,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 07:39:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-11-07 07:39:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-07 07:39:13,794 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 23 [2021-11-07 07:39:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:13,794 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-07 07:39:13,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:39:13,795 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-07 07:39:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:39:13,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:13,796 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:13,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:14,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:14,010 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash -567430243, now seen corresponding path program 1 times [2021-11-07 07:39:14,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:14,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195100263] [2021-11-07 07:39:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:14,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:14,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:14,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 07:39:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:39:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:14,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-07 07:39:14,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-07 07:39:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:14,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:14,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-07 07:39:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:15,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:15,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195100263] [2021-11-07 07:39:15,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195100263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:15,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 07:39:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801060876] [2021-11-07 07:39:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:39:15,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:39:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:39:15,003 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:15,443 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-07 07:39:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-07 07:39:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:15,445 INFO L225 Difference]: With dead ends: 69 [2021-11-07 07:39:15,445 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 07:39:15,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 07:39:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 07:39:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 62 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-07 07:39:15,451 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 25 [2021-11-07 07:39:15,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:15,452 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-07 07:39:15,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:15,452 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-07 07:39:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:39:15,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:15,454 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:15,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:15,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:15,665 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:15,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1035621474, now seen corresponding path program 1 times [2021-11-07 07:39:15,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:15,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555298128] [2021-11-07 07:39:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:15,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:15,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:15,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:15,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 07:39:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:15,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:39:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 07:39:16,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 07:39:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:16,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 07:39:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:16,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:16,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555298128] [2021-11-07 07:39:16,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555298128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:16,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:16,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 07:39:16,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690957862] [2021-11-07 07:39:16,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:39:16,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:39:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:39:16,641 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:17,041 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-11-07 07:39:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-07 07:39:17,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:17,043 INFO L225 Difference]: With dead ends: 68 [2021-11-07 07:39:17,044 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 07:39:17,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:17,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 07:39:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-07 07:39:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 61 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-11-07 07:39:17,049 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 26 [2021-11-07 07:39:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:17,050 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-11-07 07:39:17,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-11-07 07:39:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:39:17,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:17,052 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:17,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:17,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:17,261 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr9ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2039494522, now seen corresponding path program 1 times [2021-11-07 07:39:17,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:17,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564259308] [2021-11-07 07:39:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:17,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:17,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:17,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 07:39:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:39:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:17,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-07 07:39:18,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-07 07:39:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:18,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:18,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-07 07:39:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:18,760 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:18,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564259308] [2021-11-07 07:39:18,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564259308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:18,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:18,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-07 07:39:18,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106214575] [2021-11-07 07:39:18,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:39:18,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:18,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:39:18,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:39:18,762 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:19,661 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-11-07 07:39:19,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:39:19,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-11-07 07:39:19,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:19,667 INFO L225 Difference]: With dead ends: 67 [2021-11-07 07:39:19,667 INFO L226 Difference]: Without dead ends: 67 [2021-11-07 07:39:19,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:39:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-07 07:39:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-07 07:39:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.4) internal successors, (63), 60 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-07 07:39:19,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 27 [2021-11-07 07:39:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:19,672 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-07 07:39:19,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-07 07:39:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:39:19,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:19,674 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:19,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:19,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:19,875 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1217488631, now seen corresponding path program 1 times [2021-11-07 07:39:19,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:19,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714336810] [2021-11-07 07:39:19,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:19,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:19,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:19,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 07:39:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:39:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:20,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 07:39:20,591 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-11-07 07:39:20,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-11-07 07:39:20,828 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:39:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2021-11-07 07:39:21,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-11-07 07:39:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:21,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:21,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-07 07:39:21,687 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:39:21,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2021-11-07 07:39:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:21,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:21,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714336810] [2021-11-07 07:39:21,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714336810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:39:21,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:21,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-07 07:39:21,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132637287] [2021-11-07 07:39:21,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:39:21,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:39:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:39:21,812 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:24,987 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-07 07:39:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:39:24,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-07 07:39:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:24,989 INFO L225 Difference]: With dead ends: 73 [2021-11-07 07:39:24,989 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 07:39:24,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:39:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 07:39:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-07 07:39:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.346938775510204) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-11-07 07:39:24,995 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 28 [2021-11-07 07:39:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:24,996 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-11-07 07:39:24,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-11-07 07:39:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:39:24,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:24,998 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:25,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:25,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:25,218 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:25,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1217488630, now seen corresponding path program 1 times [2021-11-07 07:39:25,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:25,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298559756] [2021-11-07 07:39:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:25,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:25,222 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:25,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 07:39:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:39:25,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:25,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:39:25,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:39:25,894 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:39:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-07 07:39:25,918 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:39:25,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-07 07:39:26,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-07 07:39:26,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 07:39:26,460 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-07 07:39:26,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2021-11-07 07:39:26,740 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:39:26,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2021-11-07 07:39:26,790 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 07:39:26,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-11-07 07:39:27,137 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:39:27,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 51 [2021-11-07 07:39:27,152 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:39:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-07 07:39:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:27,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:28,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2021-11-07 07:39:28,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2021-11-07 07:39:29,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-07 07:39:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:37,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:37,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298559756] [2021-11-07 07:39:37,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298559756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:39:37,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:37,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-07 07:39:37,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377669043] [2021-11-07 07:39:37,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:39:37,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:39:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=259, Unknown=3, NotChecked=0, Total=306 [2021-11-07 07:39:37,429 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:39:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:41,329 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-11-07 07:39:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:39:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-07 07:39:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:41,332 INFO L225 Difference]: With dead ends: 72 [2021-11-07 07:39:41,332 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:39:41,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=149, Invalid=498, Unknown=3, NotChecked=0, Total=650 [2021-11-07 07:39:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:39:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-11-07 07:39:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-07 07:39:41,337 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 28 [2021-11-07 07:39:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:41,338 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-07 07:39:41,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:39:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-07 07:39:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:39:41,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:41,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:41,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:41,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:41,541 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1200179360, now seen corresponding path program 1 times [2021-11-07 07:39:41,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:41,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266384796] [2021-11-07 07:39:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:41,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:41,557 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:41,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 07:39:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:41,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:39:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:42,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 07:39:42,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-07 07:39:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:42,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:42,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-07 07:39:42,695 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 07:39:42,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2021-11-07 07:39:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:42,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:42,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266384796] [2021-11-07 07:39:42,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266384796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:42,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:42,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-07 07:39:42,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311974479] [2021-11-07 07:39:42,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:39:42,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:39:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:42,818 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:43,350 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-11-07 07:39:43,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-07 07:39:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:43,352 INFO L225 Difference]: With dead ends: 69 [2021-11-07 07:39:43,352 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 07:39:43,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:39:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 07:39:43,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 07:39:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-07 07:39:43,356 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 28 [2021-11-07 07:39:43,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:43,356 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-07 07:39:43,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:39:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-07 07:39:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:39:43,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:43,359 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:43,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:43,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:43,565 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1449145399, now seen corresponding path program 1 times [2021-11-07 07:39:43,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:43,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714037205] [2021-11-07 07:39:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:43,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:43,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:43,567 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:43,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 07:39:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:39:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:39:44,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 07:39:44,330 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 07:39:44,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-07 07:39:44,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-07 07:39:44,550 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 07:39:44,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-11-07 07:39:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:44,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:44,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-07 07:39:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-07 07:39:45,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 07:39:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 50 [2021-11-07 07:39:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:45,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:45,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714037205] [2021-11-07 07:39:45,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714037205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:45,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:45,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2021-11-07 07:39:45,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950391778] [2021-11-07 07:39:45,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:39:45,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:45,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:39:45,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:39:45,445 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:39:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:50,452 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-11-07 07:39:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:39:50,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-11-07 07:39:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:50,454 INFO L225 Difference]: With dead ends: 84 [2021-11-07 07:39:50,455 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 07:39:50,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:39:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 07:39:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-11-07 07:39:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-07 07:39:50,460 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 29 [2021-11-07 07:39:50,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:50,460 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-07 07:39:50,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 07:39:50,461 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-07 07:39:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 07:39:50,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:50,462 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:50,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:50,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:50,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1449145398, now seen corresponding path program 1 times [2021-11-07 07:39:50,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:50,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178099779] [2021-11-07 07:39:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:50,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:50,674 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:50,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 07:39:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:39:51,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:51,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:39:51,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-07 07:39:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:51,619 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:39:51,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178099779] [2021-11-07 07:39:51,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178099779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:51,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:39:51,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 07:39:51,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190172607] [2021-11-07 07:39:51,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:39:51,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:39:51,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:39:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:39:51,621 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:51,846 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-11-07 07:39:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:39:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-11-07 07:39:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:51,848 INFO L225 Difference]: With dead ends: 63 [2021-11-07 07:39:51,848 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 07:39:51,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:39:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 07:39:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-07 07:39:51,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.183673469387755) internal successors, (58), 56 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-11-07 07:39:51,852 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 29 [2021-11-07 07:39:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:51,852 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-11-07 07:39:51,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 07:39:51,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-11-07 07:39:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 07:39:51,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:51,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:51,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:52,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:52,057 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr26ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-07 07:39:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:52,058 INFO L85 PathProgramCache]: Analyzing trace with hash -102022449, now seen corresponding path program 1 times [2021-11-07 07:39:52,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:39:52,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248716756] [2021-11-07 07:39:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:52,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:39:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:39:52,059 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:39:52,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 07:39:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:52,566 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:39:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:52,743 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-07 07:39:52,744 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 07:39:52,745 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 07:39:52,768 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 07:39:52,768 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 07:39:52,769 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-07 07:39:52,769 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-07 07:39:52,769 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-07 07:39:52,769 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-07 07:39:52,769 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-07 07:39:52,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-07 07:39:52,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:39:52,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:39:52,770 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:39:52,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-07 07:39:52,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-11-07 07:39:52,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-11-07 07:39:52,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-11-07 07:39:52,772 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-11-07 07:39:52,772 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-11-07 07:39:52,772 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-11-07 07:39:52,772 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-11-07 07:39:52,773 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-11-07 07:39:52,773 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-11-07 07:39:52,773 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:39:52,773 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:39:52,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 07:39:52,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-11-07 07:39:52,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-11-07 07:39:52,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr0REQUIRES_VIOLATION [2021-11-07 07:39:52,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr1REQUIRES_VIOLATION [2021-11-07 07:39:52,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr2REQUIRES_VIOLATION [2021-11-07 07:39:52,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr3REQUIRES_VIOLATION [2021-11-07 07:39:52,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr4REQUIRES_VIOLATION [2021-11-07 07:39:52,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr5REQUIRES_VIOLATION [2021-11-07 07:39:52,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr6REQUIRES_VIOLATION [2021-11-07 07:39:52,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr7REQUIRES_VIOLATION [2021-11-07 07:39:52,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr8REQUIRES_VIOLATION [2021-11-07 07:39:52,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr9REQUIRES_VIOLATION [2021-11-07 07:39:52,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr10REQUIRES_VIOLATION [2021-11-07 07:39:52,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr11REQUIRES_VIOLATION [2021-11-07 07:39:52,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr12REQUIRES_VIOLATION [2021-11-07 07:39:52,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location appendErr13REQUIRES_VIOLATION [2021-11-07 07:39:52,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:52,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:39:52,997 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:53,000 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 07:39:53,017 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 07:39:53,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 07:39:53 BoogieIcfgContainer [2021-11-07 07:39:53,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 07:39:53,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:39:53,051 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:39:53,051 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:39:53,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:48" (3/4) ... [2021-11-07 07:39:53,055 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 07:39:53,056 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:39:53,057 INFO L168 Benchmark]: Toolchain (without parser) took 67110.41 ms. Allocated memory was 52.4 MB in the beginning and 90.2 MB in the end (delta: 37.7 MB). Free memory was 28.3 MB in the beginning and 58.8 MB in the end (delta: -30.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:53,058 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory was 34.5 MB in the beginning and 34.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:39:53,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 778.36 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 28.1 MB in the beginning and 47.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:53,059 INFO L168 Benchmark]: Boogie Preprocessor took 84.86 ms. Allocated memory is still 71.3 MB. Free memory was 47.2 MB in the beginning and 44.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:53,060 INFO L168 Benchmark]: RCFGBuilder took 1200.47 ms. Allocated memory is still 71.3 MB. Free memory was 44.1 MB in the beginning and 32.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:53,060 INFO L168 Benchmark]: TraceAbstraction took 65034.45 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 31.7 MB in the beginning and 58.8 MB in the end (delta: -27.1 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:53,061 INFO L168 Benchmark]: Witness Printer took 5.09 ms. Allocated memory is still 90.2 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:39:53,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory was 34.5 MB in the beginning and 34.4 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 778.36 ms. Allocated memory was 52.4 MB in the beginning and 71.3 MB in the end (delta: 18.9 MB). Free memory was 28.1 MB in the beginning and 47.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 84.86 ms. Allocated memory is still 71.3 MB. Free memory was 47.2 MB in the beginning and 44.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1200.47 ms. Allocated memory is still 71.3 MB. Free memory was 44.1 MB in the beginning and 32.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 65034.45 ms. Allocated memory was 71.3 MB in the beginning and 90.2 MB in the end (delta: 18.9 MB). Free memory was 31.7 MB in the beginning and 58.8 MB in the end (delta: -27.1 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.09 ms. Allocated memory is still 90.2 MB. Free memory is still 58.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 537]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 537. Possible FailurePath: [L539] struct item *list = ((void *)0); VAL [list={31:0}] [L541] CALL append(&list) VAL [plist={31:0}] [L530] struct item *item = malloc(sizeof *item); [L531] EXPR \read(**plist) VAL [\read(**plist)={0:0}, item={1:0}, plist={31:0}, plist={31:0}] [L531] item->next = *plist VAL [\read(**plist)={0:0}, item={1:0}, plist={31:0}, plist={31:0}] [L532] EXPR item->next VAL [item={1:0}, item->next={0:0}, plist={31:0}, plist={31:0}] [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) [L532-L534] EXPR (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={5:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={5:0}, plist={31:0}, plist={31:0}] [L532-L534] item->data = (item->next) ? item->next->data : malloc(sizeof *item) VAL [(item->next) ? item->next->data : malloc(sizeof *item)={5:0}, item={1:0}, item->next={0:0}, malloc(sizeof *item)={5:0}, plist={31:0}, plist={31:0}] [L535] *plist = item VAL [item={1:0}, plist={31:0}, plist={31:0}] [L541] RET append(&list) VAL [list={31:0}] [L542] COND FALSE !(__VERIFIER_nondet_int()) [L543] \read(*list) VAL [\read(*list)={1:0}, list={31:0}] [L543] COND TRUE \read(*list) [L544] EXPR \read(*list) VAL [\read(*list)={1:0}, list={31:0}] [L544] EXPR list->next VAL [\read(*list)={1:0}, list={31:0}, list->next={0:0}] [L544] struct item *next = list->next; [L545] EXPR \read(*list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) VAL [\read(*list)={1:0}, list={31:0}, next={0:0}] [L545] free(list) [L546] list = next VAL [list={31:0}, next={0:0}] [L548] \read(*list) VAL [\read(*list)={0:0}, list={31:0}, next={0:0}] [L548] COND FALSE !(\read(*list)) [L553] return 0; [L539] struct item *list = ((void *)0); [L553] return 0; VAL [\result=0, next={0:0}] - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 546]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 531]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 533]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 112 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 64.8s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 30.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 773 SDtfs, 852 SDslu, 2168 SDs, 0 SdLazy, 2359 SolverSat, 148 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 25.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 681 GetRequests, 524 SyntacticMatches, 12 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=0, InterpolantAutomatonStates: 119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 64 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 25.0s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 622 ConstructedInterpolants, 47 QuantifiedInterpolants, 6231 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2049 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 32 InterpolantComputations, 28 PerfectInterpolantSequences, 8/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 07:39:53,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb17a16c-427f-41ed-8158-76c05454d17a/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample